DIY Co2 Generator D-301 or D-501
I'm doing a rescape in my 46gal and want to add the following plants
(I haven't decided)
I don't think these plants NEED Co2, but I know it would help them. (esp the Ludwigia in turning red) So, has any one ever used the DIY Co2 Generator D-301 or D-501? What's your recipe, what size tank, how long does it last? If I can use one of these, I would rather do that then spend the money on presurized co2.