FILTRATION QUARANTINE TANK: 10 Gallon - Elite Mini Filter - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 13 Old 11-18-2011, 10:51 AM
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I keep a sponge on the intake of a HOB filter. When I set up my QT tank, I pull off the sponge, stick it back onto its original air-driven sponge filter setup and plop it into my QT tank.

I do that mainly for convenience. Initially, I set up my QT tank and just did a 50% water change every day. That, along with lots of plants, kept the water pristine. Now I keep the 10 gallon set up as a plant grow-out (trimmings) tank and when I need a QT tank, I drop in the sponge filter for a little extra "oomph" and the tanks ready to go. When the 10 gallon gets too full of plants, I sell or give away a few plants. It IS a temptation to stock the tank, I admit....

18 species/varieties of fish, 15 species/varieties of plants - The fish are finally ahead of the plants!
*560 gallons (2120 liters) in 5 tanks -> you do the math.
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post #12 of 13 Old 11-18-2011, 11:11 AM
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Sounds like an excellent way of doing it.
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post #13 of 13 Old 11-18-2011, 11:20 AM
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Originally Posted by AbbeysDad View Post
Visualize for a moment that we have a 10g established tank (A) with a sponge filter and a few fish (in this example, no susbstrate or decor). Now we setup another 10g tank (B) with fresh water. Now we move the filter and the fish from tank A to tank B. All that's changed is the water. The fish will quickly produce ammonia and the bacteria colony in the filter keeps marching on....right?
The only time we can have an ammonia spike is if/when the bio-load suddenly and dramatically exceeds the processing capability of the bacteria colony. This is most often the case in a new tank uncycled tank with little/no bio-seed, several new fish are added at once, or severe over feeding takes place.
Yes that's exactly correct, BUT.... the number of ammonia eating bacteria is fairly low and the number of nitrite eating bacteria is fairly high, I'm thinking. So there might be a short ammonia spike while the bacteria catch up to the load.

I think Calmwaters hit the nail on the head.... biological media from a well populated tank to handle a small number of fish in a qt tank - overdo it, in other words, with bacterial action and let the little buggers figure it out for themselves.
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