I ran Rid Fungus for 7 days at the suggested amount and it cleared up my problem. But I am curious if this stuff is bad for the beneficial bacteria in my tank? Anyone ?
no it wont kill it if its an anti fungul med. it would say on the bottle or leaflet if it has anti-bacterial properties and may damage BB. like FSM said you already used it for a week without issue, a bit late to be worrying about it now .
It doesn't look like this one will harm the bacteria. You could always test the water just to be sure and do water changes wherever necessary. There are some active ingredients I know that are used in antibiotics that will definitely destroy your beneficial bacteria but not this one.