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My penguin bio filter died so I had to purchase a new one. I put filter media from the old in the new to keep the beneficial bacteria in the tank. Question is how long should I leave the old filter media in so the bacteria can be good the new filter? I really don't want to lose any fish because...

I picked up a couple of free convict cichlids, maybe 2 weeks ago. One is pink and the other has black and grey stripes. I just looked into the tank(20g by themselves) and there is swimming fry!!! I have no idea what to do. Should I leave them and let the parents(I assume) protect them or is...

Seem to have black algae growing in my tank. I had 2 Chinese algae eaters in my tank(one gold one brown) and the brown guy use to eat it but the gold one isn't??? I put the brown one in a different tank over 2 months ago

I just noticed this patchy skin coloring but it's behavior is the same, except I caught it sucking on a play fish last night

Just recently bough some new cichlids, I have some in a different tank so I already know how to care for them, but the new ones I got were labelled "various small Cichlids" so I'm looking for the specific name and my little guys :) thanks

Was out of town for 10 days but I found no dead fish in my 20g tank. Now that I've really looked at my fish I can't see my 2 zebra danios & possibly some black tetras. Has anyone had a fish die with no evidence?

Just wondering how old before my baby electric yellow cichlids will get their colours. right now they are 3-4 months old

It looks like I will be moving in a few weeks and I'll need to get my 20g & 10g there. Its a 45 min drive. I was thinking I would put both in my hatch(Kia Soul has a power outlet there) and keep just the heaters going in both tanks. But will the have enough oxygen for the trip?

She's been mating with one of my male blue platys for well over 24 hours but she's already pregnant. I want to move her to a tank by herself but I'm not sure when to do it and if I should take her away from her mate just yet. Is there a way to tell when she'll give birth?

Hi I'm so excited to have found this!!! Sooo many fish questions. I've been running a small 3 g tank for approx 3 yrs until I replaced a fish and the new fish killed the other fish too! So I upgraded to a 20g tank! Fully stocked freshwater community aquarium. And I've just discovered one of my...