I do have 8 Von Rio's in there right now, they seem to like their new cover vs the old plastic plants I had in there before. I just ordered a package online and totally didnt realize that they had like 7 crypts in it. So those might get taken to the LFS for some credit. I'm going to see how a "low tech" approach will do on this tank with just ferts and excel.
I looked at DIY co2, but for a 75 gallon, most people think it's not the best idea. I'll go pressurized co2 if I go that way. Though, I did have a idea of using one of my plastic carboys for brewing beer (5.5 gallon I think). I got a couple of them and I got stoppers for them. But that would be A LOT of sugar. heh.
And now that I have that idea in my head...... I might see what I can do. heh.
18.5 cups of sugar and 4.5 tsp of yeast I think. If I just scaled up the 2 liter directions.