Help! Fish dying, inverts doing fine!

mikeyfishy

Member
I've searched and found some other threads where fish die when put into the tank, but I don't see any with my particular circumstance. This is my first post and I'm looking for some support/help. I'm quite experienced with freshwater but I'm new to saltwater and am having a helluva time trying to get things running!
My particulars:
46 gallon bowfront tank
60 pounds live sand
small amount of live rock
Aqua Clear 70 filter
Protein Skimmer
4 inch air stone
Temp: 75F
pH: 8.3
Salinity: 1.022
Ammonia: 0 to 0.5 (see below)
Nitrite: 0 to .125 (see below)
Nitrate: 20
I'm going to try to keep this as short as possible as I tend to overanalyze and overtalk things but it ain't going to be easy as I want to give as much info as possible, otherwise I'll end up answering all these questions later in the thread anyway. The tank has been up and running for about 6 weeks. In the beginning, I put in 40 pounds of the Nature's Ocean live sand, ran it for about 4 days, and put a few fish in (2 clownfish, a couple of tangs, and a royal gramma) along with the inverts: three peppermint shrimp, a half dozen tiny hermit crabs, a cleaner shrimp, and a chocolate chip star. For the fish, I did them one at a time spaced about 3 days apart each, monitoring ammonia and nitrites to make sure they weren't rising. The tank ran for about 2 weeks with no problem, then the problems started.
The tank ran at least 2 weeks with no detectable ammonia or nitrites and then all of a sudden they went up to about .5 ammonia and .5 nitrite and kind of just sat there. I'm certain I didn't overfeed and I test with the Saltwater Master Test Kit (liquid chems). I tried every solution known to mankind to bring the ammonia/nitrites down including water changes (can't change enough water to make a big difference and with each water change the fish seemed to get more stressed and look worse), several types of liquid bacteria, and even adding more live sand. I tried Chloram-X and Amquel Plus as well just out of desperation, but nothing worked. The fish all slowly died over about 3 days.
Through all of this, the inverts were all fine and still are. I waited about a week and ammonia and nitrites went back to zero with the inverts still in there so I figured I just tried to add fish too soon and that the "cycles instantly, just add fish" advertised by that live sand just didn't work and now my tank was finally cycled completely. I added one tiny clownfish and one small Heniochus back to the tank figuring it was safe. Within 2 days, my ammonia levels were back at 0.5 and my nitrites were between zero and .25 (I guess about .125). The clownfish died and now the Heniochus looks like it is starting to swim cocked at an angle (the way the others all acted before they eventually lay on the bottom and died).
I was told by the fish store that the clown and Heniochus were hardy enough that they should survive the 0.5 ammonia and 0.125 nitrites and would be able to survive a cycling tank. I don't know what is going on. I read the acclimation procedures and didn't follow those. I did what the store told me: bags in tank for 30 minutes, then double the water volume in the bags by adding some water from the tank, wait another 30 minutes, and let 'em loose. Even though I'm not following the acclimation procedures here, I'm not suspecting that as the problem because the fish seem to do well for a day or two until the ammonia rises, and then they die.
Not sure what to do.
Seems like with three peppermint shrimp, a cleaner shrimp, and a chocolate chip star in there, there should already be some bio-load and adding a couple of small fish shouldn't make it spike like that. Also not sure that 0.5 ammonia and 0.125 nitrites is enough to cause fish fatalities in just a few days. Maybe it's something else???
Thanks for any help,
Mike
 

teresaq

Active Member
Hi, and Welcome. wow. Were do I start. ok. first
Your tank is still cycling, and should not be done with any fish. Most people on this site will tell you to use dead shrimp from the grocery store, and that the cycle will tank 6 weeks or more.
your SG is a little low. it should be a little closer to 1.024 or .025
 

mikeyfishy

Member
Aha. I was wondering how I'd be able to cycle this tank without risking/killing any more fish. Just buy some frozen shrimp and throw 'em in? How many should I use and how long should I leave them in there? I guess I'll go do a search on that. Thanks!

Mike
 

hot883

Active Member
Throw in 1 raw shrimp for 3-5 days. It will get "fuzzy" and you know it is working. I would not use an airstone in the tank either. The micro bubbles are very hard on saltwater fish' gills.
Welcome to the boards. Barry
 

teresaq

Active Member
sorry I was still working on my answer but my computer froze
Yup take out the air stone, you dont need it.
your fish prop died from acclumation shock and too manty thrown in to a new system.
I just lost one not realizing that the two fish i bought were in diff systems within the fish store. I put them together to acclumate and lost one.
 

mikeyfishy

Member
Originally Posted by hot883
Throw in 1 raw shrimp for 3-5 days. It will get "fuzzy" and you know it is working. I would not use an airstone in the tank either. The micro bubbles are very hard on saltwater fish' gills.
Welcome to the boards. Barry
Oh man. So much to learn! I have the airstone all the way at the back of the tank and have never seen the fish swim through it. Does it hurt if they aren't swimming through it? The only reason I added it was to boost DO levels hoping it would relieve some stress on the fish. Or... do those things put bubbles that I can't see throughout the entire tank and that's a danger?
Also, with the shrimp decaying, is it going to be OK in there with my existing inverts? I'd think the live shrimp, small hermits, and maybe even the chocolate chip are going to try to eat it before it decays. Whether they can eat it before it decays, I don't know.
Thanks again,
Mike
 

teresaq

Active Member
if you still have inverts, then dont do the dead shrimp. just keep an eye on everything for a few weeks. do at least a 10% to 15% water change each week. Dont add any more fish right now. I know its hard but you dont want to lose any more.
 

teresaq

Active Member
do you have any powerheads in your tank. you should take out the air stone and add at least two powerheads one right at the surface and one twords the bottom on the other end. this will help circulate the water and provide penty of o2. also look into a hyro flow for them I love them and they really circulate the
Also, you might rethink your fish list. your tank is way to small for any tangs. they need 6 ft of swimming room. I would stick with a few smaller fish. clowns, gobies, blennys, chromis, fairy wrasse.
wait at lease two weeks, check all your levels, then add two small clowns acclimating them slowly. dripp into a bucket for at least an hour and a half. depends on what the SQ is at your fish store. Ask them. if thiers is 1.017 and yours is 1.024 then thats a big change for the fish.
 

mikeyfishy

Member
Thanks. Just took out the airstone. I would think that I have enough flow without powerheads, but maybe you can advise. Between the aqua clear 70 and the protein skimmer, they both flow out in the same direction onto the top surface and when I put food in, you can tell that the water is being turned over, flowing toward the front of the tank on the surface, down the front of the tank, toward the back of the tank on the bottom, and up the back in a sort of circular fashion. Isn't this enough for good DO levels? I only got the airstone because the fish store recommended it. I should have known better than to listen to them.

Also, do you think that the (living) inverts that are in there are going to produce enough waste to cycle the tank? I used 60 pounds of live sand and it's been 5-6 weeks. I would think this thing would be cycled by now. Is there some common mistake that maybe I made that slowed down the cycling?
Mike
 

teresaq

Active Member
Yup never trust lfs unless you have a long standing relationship. they are out to get your money. Research is the key. I would add at least one just to be sure. maybe a maxijet 900 so you dont get any dead spots.
you might take a look at this in archives https://forums.saltwaterfish.com/t/80022/advise-for-new-hobbyists
lots of good info for new people
In answer to your second part, yes you may have restarted your cycle. I would just give is a couple of more weeks to be sure.
Also you can feed your hermits a little flake. there may not be anything in there for them to eat, just every other day or so.
 
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