converting a 75 tank to a sump

ReelNorth

Reefing newb
I am converting my 75 gallon tank into a sump. I was thinking today that I have dosed it with malachyte blue for some ich I had (freshwater)

Can I still use the tank as a sump for my 220 reef?
 
yeah, you should be ok...it also kinda depend on how long ago...just clean it out very well with bleach and water...and then very, very well with a vinegar water mix solution, and then rinse very very very well :)
 
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