I have a 10 gallon tank with 9 fish, I got a rainbow shark from Petco and I was told that he wouldn’t be a problem/ menace and would only grow to 4’ but I went to petsmart for a guppy and they said the opposite, so I want to upgrade to a bigger tank but I don’t know how long I would have to cycle the tank (wether I get a 20 or 29 gallon)
Posted by ApprehensiveMonk9779