Re: What substrate do you grow your crypts in? There's a fungus that grows on bat guano that's deadly to humans. I wouldn't mess with that stuff.
I use "Ma" Reimer/Charlie Drew's "secret". Manure under beach sand. I add nails, washers and steel wool for iron. Flourish excel or CO2 in some tanks. I add Barr's fert formula which makes them grow more qiuckly; they grow fine without, just not as fast. |