Originally Posted by deathadder7
Hello. Today I came home to find that my tank water is much cearer! It's not crystal, but it is much better than before. And my only white cloud seems to be much happier too. Why is this? Might it be the result of the absence of the other fish and now the ammonia levels are lower? My white cloud is still not eating but i just know it's healthier than before
. I wander if there is still enough ammonia to finish the prosess.....
Also, sorry for the confusion. My tank dimentions are in CM.
OK, so this is a smaller tank [Arkamaic, you had it figured correctly!], a 20 litre or 5 US gallon tank. Knowing that, yes, the white cloud will start the cycle. Yes, the whitecloud's improvement is due to the slightly improved water quality because the bacteria are beginning to handle the ammonia and with only one fish there is less of it.
Do you have a test kit as someone earlier suggested? API make a good one that includes ammonia, nitrite, nitrate and pH. You ammonia will rise and then fall (to "0" in 5-8 days from the first fish going in the tank), and near the end of this phase the nitrite will rise sharply and then drop back to "0" (another 5 or so days). When you have readings of "0" for ammonia and nitrite for several consecutive days (only need to test once a day), the tank is cycled for the bioload in it at that time. You can then add another fish or two, slowly, waiting a couple of days between each addition to allow the bacteria time to multiply to the level required to handle the increased ammonia/nitrite.
As earlier members said, you were way over-stocked. A 5 gal tank is too small for giant danios. You will be OK with a small group of whiteclouds (6 would be fine, they like being in groups) and 3 small species of corys, but that is about it. You will need to do a partial water change of minimum 25% of the water volume every week, and with good filtration and no overfeeding you should have no problems. But add the new fish slowly as I indicated, and only after the tank is cycled; initial cycling can take anywhere from 2 to 8 weeks; your test kit readings will tell you how it's progressing.