skimmer in a coral only tank?

acrylic51

Active Member
acekjd83 excellent argument smarls!
i agree that if there is "no bioload" then a protein skimmer is pointless, but.... who has a tank with no bioload? every organism (with the exception of plants) that an aquarist wants in their tank excretes ammonia, including corals, sponges, crabs, fish and starfish. even the little copepods and brine shrimp that you dont see because they only come out at night excrete ammonia. there is more bioload in your tank than you might at first think...
with this in mind, i believe that a skimmer is a very important part of a sw setup, and that going without will limit the numbers and types of animals you can keep, and create much more work and annoyance than what a low-end skimmer would cost. BUT, if you're bound and determined to go without it, then good luck, and do lots of water changes!
Acekjd83 Smarls argument is pointless every tank has a bioload if it has living organisms in like you said so how does he have a solid case????:eek: He Doesn't!!!!!!:D
Smarls you say just a coral tank???? smarls Acrylic,
I think the question was if there is NO bioload, ie - a coral only tank, then is a skimmer needed? In my opinion I don't think so, particularly with regular water changes.
Obviously with a bioload, a skimmer (or some form of mechanical / biological filtration) is needed, but without a real bioload from any animals (and yes, snails etc make some bioload) what is the need for exporting nutrients that actually are never present in the system? The biological filtration should be able to handle minimal amounts of nutrients produced only by the corals. No fish, no inverts, no feeding...almost no bioload.
How do you know what the real bioload is on your system??? You don't so again "dead in the water" You are trying to persuade people to believe and you won't find to many that will go skimmerless. Not saying it can't be done, but I would really have to have NSW at my disposal to try it that way.....Do you have NSW at your disposal feeding the tank constantly???? Again your point of just having a "Coral tank" is pointless. YES their is a bioload and you corals can send out toxins to combat other corals and a skimmer would be a good line of defense along with carbon to combat these toxins!!!!!!!!! But I forgot your doing water changes everyday to remove the bioload from your system???? To many water changes on a system is more harmfull than good skimmer and filter system.....You system would never be stable, because their would to much influx in things with a daily water change unless you have a way of fixing your parameter match eveytime.....
In the case of a bioload tank, the bet is that the skimmer removes more of the bad than it does the good, and the good can be replenished through water changes, supplements etc. The benefit of removing the bad (no algae build up, better water quality, etc) outweights the damage of removing the good (loss of trace items that can be good for the tank).
Smarls again your point is way off base with a bioload a skimmer is removing bad and some good (trace elements) and you keep saying good and the only thing you've mentioned good it removes is trace elements so again pointless because water changes are going to replace them so what's your point in saying they remove good things when your replacing them anyways with a water change???? It's pointless!!!!

However, in a case where there is no bioload in a tank, and thus very few nutrients to be removed, a skimmer will be taking more of the good stuff than the bad stuff, as there is actually very little bad elements int he tank. Removing more positive elements from the water than negative elements is detrimental unless the bad stuff left creates a problem. In the event with a very low bioload, with water changes, I think the skimmer may do more harm than good, and may prove unnecassary.
Smarls there you go again saying no bioload!!!! If you have no bioload it means you only have water and salt in the tank dude!!!! Live rock, fish, inverts, corals all produce waste, so if you have a empty tank you have no bioload!!!!!!!! So again you point is pointless!!!!!:D
I'd like to see you post some hard facts about overskimming... I'd like to see a tank that is overskimmed??? Apparently you haven't looked at Steve Wests' tank and that is a real setup and you won't hear him say about overskimming a tank... So again if your keeping an anenome and a clown I would still say you need a skimmer.... It's up to you, but you won't win the argument of no bioload or no skimmer in a coral tank!!!!!! Wake up a skimmer is needed!!!!!!
 

acrylic51

Active Member
No you agree with his arguments for no skimmer. If he has NO BIOLOAD, then why have the tank running???
acekjd83 excellent argument smarls!
i agree that if there is "no bioload" then a protein skimmer is pointless, but.... who has a tank with no bioload? every organism (with the exception of plants) that an aquarist wants in their tank excretes ammonia, including corals, sponges, crabs, fish and starfish. even the little copepods and brine shrimp that you dont see because they only come out at night excrete ammonia. there is more bioload in your tank than you might at first think...
If he has no bioload then he has nothing in the tank that is living!!!! Meaning LR, inverts, corals, fish etc..... So of course you wouldn't need a skimmer. He's trying to get out with just corals you don't need it and his point is senseless!!!!!
I think the question was if there is NO bioload, ie - a coral only tank, then is a skimmer needed? In my opinion I don't think so, particularly with regular water changes.
Obviously with a bioload, a skimmer (or some form of mechanical / biological filtration) is needed, but without a real bioload from any animals (and yes, snails etc make some bioload) what is the need for exporting nutrients that actually are never present in the system? The biological filtration should be able to handle minimal amounts of nutrients produced only by the corals. No fish, no inverts, no feeding...almost no bioload.
I think he's missing the point that even though there is no fish or inverts and no feeding you still have a bioload with LR, and corals!!!!!! That's why I'm saying he has a bioload regardless of not having fish, so again the ANSWER TO HIS BIOLOAD QUESTION IS YES A SKIMMER IS NEEDED BECAUSE HE WOULD HAVE A BIOLOAD WITH OR WITHOUT FISH, WITH OR WITHOUT FEEDING, OR INVERTS ETC.....
:yes:
Hey Smarls what type of filtration setup are you running to handle this bioload and what are you running for nutrient exportation???
 

smarls

Member
Acrylicand Acek,
I think you have started to mix mechanical filtration and biological filtration as you see fit!
If they have LS and LR a tank can handle the minimal amount of filtration required to handle any excretions from a coral only tank (yes including your copepod excretions!)...again, depending on the tank (which you note, I have said all along) I don't think a skimmer is required.
I run a HOB Prizm for my tank...with a lot of LR It is a piece of **** and I often leave it turned off for weeks/months at at time, and when I do have the skimmer turned on, I use it more to run media (carbon for water polishing) than for anything else.
I have a very low (in my opinion, virtually none) bioload though, ie - coral, snails, amphipods, copepods - but no fish (currently) I do have a lot of coral. So I can get away with not running a skimmer for extended periods of time, because IMHO the biological filtration can easily handle the bioload. But the tank has been running as a reef for about two years now.
So - how do I run a tank with no skimmer and a low bioload without a skimmer most of the time? I limit my inputs, I do water changes and I have biological filtration that can handle the minimal amount of output from the coral and snails...
So I think your quote "ANSWER TO HIS BIOLOAD QUESTION IS YES A SKIMMER IS NEEDED BECAUSE HE WOULD HAVE A BIOLOAD WITH OR WITHOUT FISH, WITH OR WITHOUT FEEDING, OR INVERTS ETC....." is simply wrong.
I understand your point, but I think you completely ignore the benefits of biological filtration...and I think that is why you feel that something that quite a few people do (skimmerless tanks) is impossible.
Stewart
PS - Don't get me wrong, if I started adding fish to my tank, the first thing I would do is upgrade to a decent skimmer...but until then, it is not needed wiht biological filtration....which was the posters original question...
 

acrylic51

Active Member
Bull!!!!!! Good luck but trust me a skimmer is needed since you do have a bioload no matter how you chose to look at it! !!!!!!!
 

smarls

Member
Bull what?
Bull that there is not benefit to biological filtration?
Bull that my skimmer sucks and I don't use it?
Bull that it is not possible for a tank to be in some form of general stasis without manually removing and adding lots of stuff to try and rebalance the stasis?
I am not sure what you are saying "bull" about??
I think we have a fundamental difference of approach here. I do not like to add/remove lots of stuff to my tank (food, additives, etc.). I prefer to try and get it somewhere to stasis. As it is a closed system this is not entirely possible, but it is possible to get close. I use bi-ionic for buffering purposes and i do water changes. Personally I think biological filtration and water changes are more beneficial to a tank than skimming, but again, that is just my opinion based on my experience with a single tank.
In a quick attempt to try and actually determine how much a coral excreted and educate myself on this topic, I was forced to go to another site for a little research as the topic was not really covered here. The moderator of the site is pretty well respected in the industry, and although he did not write this response, he did specifically agree with it in his response.
“Generally corals cause a net reduction in dissolved nutrient levels, not an increase. In the waters they come from the nutrient levels are vanishingly small. Why? Everything is gobbling them up as fast as they can. As such, corals generally "clean-up" a tank if nutrients are in a form they can use. Most corals tend to produce very, very little waste (except perhaps for mucus--they produce a lot of that). That which they capture heterotrophically they utilize, and what they cannot use is usually utilized by the zooxanthellae. These then can be dealt with by the coral. You see, they aren't really excreting that much of anything.”
From a forum on a different site, moderated by Eric Bornemen. I don't think my arguements "dead in the water" or "pointless" as you state...(state rather rudely I might add)
So I don't think the standard definition of "bio-load" necessarily applies to a coral only tank...it may, or it may not, but that is very tank and system dependent.
I agree with your opinion on a heavy bioload tank, but I do not agree with your absolute statements of fact that skimmers are required for low-bioload tanks...I think such statements of fact are rarely correct and should rarely be made.
Stewart
 

smarls

Member
ps Acrylic - I think this is more a reef issue now than a beginners question, and we should move it to the reef forum if you want to continue this discussion...thoughts?
 

acekjd83

Member

Originally posted by acekjd83
i believe that a skimmer is a very important part of a sw setup, and that going without will limit the numbers and types of animals you can keep, and create much more work and annoyance than what a low-end skimmer would cost. BUT, if you're bound and determined to go without it, then good luck, and do lots of water changes!:)

i would really appreciate it if i wasnt misquoted...
i said that you can go without a skimmer (in fact smarls, i'm in the same situation with my skimmer...) but it will "LIMIT THE NUMBERS AND TYPES OF ORGANISMS". you can certainly go without a skimmer (what do you think people did before skimmers were developed?) but you have to do more water changes to help with the nitrates. there are not very many denitrifying (NO3->N2) bacteria in an aquarium, so you cant rely completely on the natural nitrogen cycle, water changes will need to be done more frequently than they would in a skimmed tank.
I dont see why this is such a heated debate... not every tank has the same requirements, and you cant get all pissy just because someone has a different technique for managing their aquarium. if everyone had the same tank, this hobby would be really boring, and there would never be any advances in technique or technology.:confused:
 
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