I am diligent with water changes, with water tests, 99% of the time the water tests are normal, but all tests have shown no nitrates... I havent had any issues with my tanks till just recently.
My 20 gal tank, all the fish keep dying one by one...i lost two of my favorite males last night. the neon tetras are doing just fine, though i did lose one about a week ago...but they have been in there for almost a month now. my guppies get this white lining on their lips first. then they start swimming funny. the males get half moon circles on their tails...and by morning their tails are nothing but rays...no fins at all. i try to separate them when i spot this, and put them in teh 10 gal hospital tank, but it doesnt seem to help...it looks like they get ich...and i treat them for it, and most are dead by the next morning.
in my 10 gal female tank...they are acting a little different. they get the white mouths. but then they start swimming wobbily...fins clamped. and before long they die too. My babies are doing just fine...though a lot of them have deformed tails, but they are all from the same mother so im thinking it was her genes.
Also...my goldfish...i keep up their water changes...sometimes daily if i have to due to tests...but they get at the very least three water changes a week as there is no filter on their tank yet. i have never seen goldfish sit on the bottom of the tank. i was told they were cold...so i put a heater in there...and the tank is now at about75 degrees. they are still sitting on the bottom. they do this most of the day. this tank also has no nitrates in it... occasionally the amonia spikes and i do imediate changes then...
PLEASE HELP ME....i dont want to lose any more fish.