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It's an lfs - they're going to try to sell you something - that's their job. Sand/gravel like in a saltwater tank would give you a bed for bacteria to grow in. You can do the same thing with a canister filter or biowheel.
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In the filter I have it has a thing that traps bacteria and you're not supposed to replace it. Is this good enough?
I want some African Cichlids and I'm maybe thinking about getting 2 blood parrots but an hour ago I fell head over heals for a Red Devil. He was so cool. He wasn't the prettiest fish in the tank but he WAS SO COOL. He kept coming to the tank and looking at me when the other fish were ignoring me. I was there for 20 minutes and the whole time he was right there watching me. If another fish would come by he would chase them away.....not too aggressivly though. It was cute. I'd put my finger on the tank and move it and he would follow it and he kept opening his mouth and he seemed like the only one in the tank with a real personality. He was so cool. Can you mix these three types of fish together?
PetsMart tested my water tonight and said it was perfect but to try to clear up the sand looking stuff in the bottom of the tank so I came home and syphoned it all out into a trashcan and stirred and stirred and messed with it for a long time and poured it back in the tank and it just settled right back in the bottom like before. sigh. I was wondering if it was because my water temp is at 75 instead of 78 like I was previously told it should be but they said as long as it is between 74-78 it is fine. Is this true?
Thanks.