Regarding Co2 refills, I also use a local Airgas location ( MA ) to swap out my 20's. The last time I went, sometime last year, I believe I paid $35, but I had also brought in an empty 10 lb, and traded up to a 20. Mike _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants