Has anyone built an external c02 diffuser? I saw a few plans on this site: http://www.plantedtank.net/forums/planted-tank-faq/23742-comprehensive-diy-c02-index-recipes-reactors.html but I wasn't sure which one would work the best for me (I have a 46 gallon tank). Perhaps there is a better plan out there. Let me know if you have built one , which plan you used, and how it is working out for you. Thanks! Hope everyone is well, Berg _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member