Yesterday I had to get rid of some Chaeto from my fuge (anyone in NNJ want some free Chaeto?) and I must of pulled 15 copepods out of a softball size. If I look in the sump it appears to have fleas. My tank is an established 90 with a 20 g sump. I know Mandarin eat a lot of copepods so how do i know when I have a good enough population? Will that many really get sucked up through my return (mag 9) or will i need to shake the chaeto out in my display? Thanks for the help.
Pat
Pat