Hi I'm starting to get that weird smell out of my tank again, not fishy but a little chemically. I have been vaccuming out the old food (there are no rocks ) but there are still some crumbs from every day eating. The water looks clear. I've had my fish in there about a week it's a 5.5 gallon. I don't have an at home water tester. I smelled this before last time I had a fish in there and a little while later the water went cloudy and he got sick and died. (may have been a bad ornament) but I am smelling it again so I added a little more cycle,
should I be worried? I have a Marina slim s10 I had just one cartridge in there and added one more last night. I don't want to move the old one (which is a little dirty) until I get more bacteria in the new filter piece.
Is there anything I should do at this point? If that water goes cloudy again I'm going to take coro out and put him into a 1 gallon till I figure it out.. but something is happening that I am not sure about