[ItsDubC]

Did you pick out the twigs etc before putting it in the tank? I've used the exact same soil in the past. I picked out as many twigs as possible, let it outgas for a few days, mixed in some crushed egg shell, and never had any issues w/ tannins. This was a few yrs ago, so I don't know if the soil formula has changed.

Anyway as stated, water changes will help a lot. I don't have any first-hand experience w/ Purigen but I've heard great things about it.

BTW, how deep is your Eco Complete top-layer?

 

[ItsDubC]

Hey ItsDubC, could you elaborate on the eggshell? How much did you put in?

Not much at all in my case. For a standard 10 gal w/ 1.5" of soil bottom layer, I crushed up about 1/4 of an egg shell's worth as fine as I could and mixed it in. The intent was to provide calcium long-term but honestly, I don't really know how it takes egg shell to decompose.