The end results - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 2 Old 10-26-2007, 01:50 AM Thread Starter
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The end results

I have been wondering, and I simply do not know, what are the end results of the denitrifyers? I mean, what are the final end products? This could explain why they still work in planted tanks even though they can eliminate the nitrates that plants need to grow. Does it change it into another form of nitrogen that plants can use possibly? Is there something that happens that helps the plants use the by products?

Just basic stuff, well maybe not so basic but I was curious.
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post #2 of 2 Old 10-26-2007, 11:21 AM
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re: End Results

Actually the ultimate result is very, very pure water. The water coming out of the denitrator will actually have no oxygen and instead have nitrogen and a few other gasses in the water. However, the nitrogen and other gasses are NOT very soluble in water. They are MUCH less soluble in water than oxygen and carbon dioxide so with just normal water flow it will rapidly return to normal concentrations. Remember fish constantly breath and absorb oxygen and increase the CO2 concentrations in the tank and if there was no water flow your fish would suffocate. The Aquaripure is a slow flow filter so this gives the effluent plenty of time to be re-oxygenated.

The slow flow action is also what allows it to be used in planted tanks. Fish are constantly producing urea and waste and this is the nitrogen the plants use even moreso than nitrates. Nitrates are usually more readily utilized by algae than most plants and the plants use up the premium urea more quickly. Any excess will be processed by the Aquaripure. Also, if you add a little fertilizer with nitrogen in it, it will remain in the tank just long enough to be utilized by the plants and the excess will again be broken down by the Aquaripure.

I can tell you one thing, my planted tank looks fantastic. I have about 18 tetras/ danios/ and mini puffers/ algae eaters in a heavily planted 29 gallon tank. I have no nitrates, no algae, and great plant growth. I know this sounds too good to be true but I swear it isn't.
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