I am 4 weeks into cycling my 35 gallon tank with fish. I have 3 zebra danios and 2 gold pristella tetras. None of these fish are the first fish I bought. I just lost another danio overnight.
I have been performing 20% PWC
's 3x/week. Using an API master test kit, my levels are: ammonia 0.25ppm, Nitrite: 0.25ppm, and nitrate: 5.0ppm. These have not changed in the last week.
I am eager to get some more pristellas, because the two I have hide all the time except to eat. One of the danios who appears to be a large female chases the other 2 danios around most of the day. I know these fish would do better in larger numbers, but from reading several sites and books, it looks like I should set up a 5-gallon quarantine tank and keep new fish there a couple weeks, rather than buying them and putting them directly in the main tank.
Is quarantining necessary? Is it still too soon to consider my tank fully cycled?
I feel like it will take forever to set up and cycle another tank, but I will do it if I have to. Any way to speed this up?