Anti-Mold agent in tank

[Chronicj7]

So I found out the sump I bought was made with an anti mold agent. It was only in my system for about 15 hours before I removed it. I've done 25 gallon water change since adding my old sump back but everything died off minus some crabs and shrooms. I need to know what the next step is to building my tank back up?

[Sk8r]

Polyfilter. Until you can get some, run carbon. You don't say how big your tank is ,so I don't know how 25 gallons relates to it. But you can change our 20% on one day, wait two days and do another 20% change.

[Chronicj7]

My apologies. The tank is 39g with a 10g sump. I did 15g the first day and 10, 24 hours later. I actually already added a polyfilter and carbon to the tank. I did another 5 gallon water change last night. How long do I need to wait for the toxins to clear up and how will I know?