So I think I'd like to get neons, or rasboras, or somethin similar to replace my current Australian rainbows, but I'm afraid that they'll get sucked up in the filter of my 20 gal
. tank like before.
So my question is, can I use more smaller filter systems instead of one big one so that there's less suction from my hob
filters? Also, with the little blue filter cartridges, should I really leave them in for more than a month, even though the instructions say to change them every month? And what's a good alternative to the blue cartridges ?