For a school experiment, I need to maintain 5 comet goldfish for the duration of the tests, a month.
Unfortunately, due to time restrictions, the tank, by good fish keeping standards, is horrible.
The fish, 5 of them, are Comets. 3 inches in size from a cheap petstore that keeps 20 of them in a 10 gallon tank.
The tank, 20 gallons, upper filter w/ activated carbon & bio ceramic & that filter cloth thing, air pump, no decorations, water's relatively cold (I know goldfish like that). Worst of all, it's UNCYCLED *gasp*, so they're prone to ammonia poisoning.
After the experiment I'll give back to the store to sell to someone who actually has a good tank.
How often should I change the water? Since it's uncycled and I have to feed them twice a day, there'll be ammonia buildup for sure. I'm thinking, 50% change twice a week?
Thanks in advance
Help me keep 5 Comets alive in a bad tank.
Remember, they're just 3 inches, but there are 5 of them in a 20 gallon uncyled tank