10-15-2009, 04:56 AM
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The only problems I see with adding fish to this particular tank are that the tank is comprised of livebearers which usually leads to more. I would hold off on adding any more fish unless I was certain that the fish presently in the tank were all males. Chances are better than average that fry will be forthcoming if even one female is present.
As for stocking levels in aquariums,, I am of the opinion that fish should all share same water requirements with respect to pH or hardness ,and temperatures. Fish compatibility should in my view also be taken into consideration. For example.. many place young cichlids in tanks and as juveniles,all is well. It is when the fish reaches sexual maturity that things begin to go awry. Fish become more aggressive,and or territorial and may or may not get along as they did before. This holds true with not only cichlids ,but many other fish as well. Adult size and filtration are also very important to consider. As fish grow,they consume more food and produce more waste. Same thing occurs with numbers of fish. While fish are small and few in numbers,the filter may be up to the task. but as numbers grow and fish grow,filter may need to be upgraded or at the very least, more frequent maint.
In my mind, It's never about how many fish can I keep,,. but rather all of the above must first be studied.