Fishless cycling and EI Dosing water changes - The Planted Tank Forum
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post #1 of 3 (permalink) Old 03-26-2010, 10:48 AM Thread Starter
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Fishless cycling and EI Dosing water changes

I am dosing using the EI Method on my tank and I have just started fishless cycling. I added 5 ml of Ammonia to my 120 litre tank to raise the level to 5 ppm and have been monitoring it. It dropped to about 0.50 ppm and then I added a further 3 ml to raise it back up to around 3 ppm overnight it has dropped back to 0.50 ppm. Seems like everything is okay so far? My Nitrites seem to have stayed high 3-5 ppm they havent dropped yet or increased off the scale. I am planning to keep adding 2.5-3 ml of ammonia untill Ammonia and Nitrites drop to zero within around 12 hours.

My question is as I am dosing using the EI Method on Sunday I will need to do a 50% water change. Will this affect my cycle? At present my tank has no fish in it only live plants.
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post #2 of 3 (permalink) Old 03-26-2010, 01:54 PM
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Just skip the water changes until you get the tank cycled. The water change with the EI method is to keep the fertilizer levels at a safe level for fish, but since you have no fish that isn't an issue. (you do have to way OD fertz to be dangerous to fish)

So just skip the water changes until you have the tank cycled. Then when you are ready to add fish do your 50% water change to reset the fert levels and add the fish. Depending how long it takes to cycle you could skip the last 2-4 days of the fertilizers to give the plants a chance to use up some the excess fertilizers in the water, then do the WC then add the fish.
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post #3 of 3 (permalink) Old 03-26-2010, 04:21 PM
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Skip the fishless cycling altogether.

Join also.
Read up about fishless cycling in planted tanks, they are not needed ever.
Plants add bacteria and remove NH4 directly, so there is no traditional fish only aquarium cycling.

You are growing plants, not bacteria

Tom Barr

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