How many bioballs??

mrmaroon

Member
I just built a sump/wet-dry. Right now I have 1 gallon of bio balls. A Prism skimmer and 50# of LiveRock. Do I need more balls. I am going to have two marroons and two other small-med fish.
 

demosthenes

Active Member
Well, I only have 1 gallon of bio-balls also, but I also have a mesh bio-roll, 125 lbs of Lr, 120 lbs of LS, and a canister w/ Kent Marine Nitrate Reductor. So, I only have 1 gallon of bio-balls, but also have a much greater source of biological filtration. So, IMO, you need more biological filtration, in some form or another.
 

wamp

Active Member
Ounds like 1lb is plenty. How big is your tank? Your LR will help with your filter so you should be fine.
 

mrmaroon

Member
It is 55 gallons.
And Sea Wraith. I think you missed the point. I BUILT a sump and wet dry for next to nothing. I would rather spend my money on lighting rather than filtration. But I am glad you like yours!
 
G

glazer

Guest
FBF systems are not without their own problems however. A wet/dry filter makes better use of its relatively limited surface area by growing a thicker coating of bacteria than is possible with FBF. The mutual abrasion between moving sand particles in FBF limits the depth to which bacteria may grow on the sand. FBF also share a disadvantage of UGF in that they deplete the water of oxygen. Fluidized bed filters are also potentially dangerous. When the water pump stops because of power or mechanical failure the sand will settle to the bottom. The packed sand can quickly become anaerobic, resulting in the death of the desired aerobic bacteria. Anaerobic sand may release highly toxic hydrogen sulfide, sometimes within hours of pump failure. However, you can prevent the filter from dying in a power outage if you have a backup generator, or even a battery-operated air pump with which to feed air to the bottom of the sand filter. This will keep the sand moving around and oxygenated enough to prevent problems from developing, at least temporarily.
(taken from an article by the Calgary Aquarium Society)
I have seen much info on these filters, pros and cons alike but thought this stated some of the drawbacks most simply.
SeaWraith,
Understand this is not meant as a flame... I have seen several posts you have made concerning the fluidized bed filters and listing the pros/virtues of this type filter. They are indeed a very good type of filter but like any and everything in this world fish related or not, nothing is perfect, there is always cons. Since people come to this board looking for advice and opinions I think it only fair that they be informed of the negatives as well, wouldn't you agree? ;)
 
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