[scolley]

Originally Posted by lauraleellbp

I'll have tons of swords in my tank, so I'll need iron...

Thanks for the links Laura! I've got swords too, and frankly they are sucking wind. They have been moved to a place where they get little light, and they don't get NEAR enough Fe. But I've been afraid to put too much in the water column. Maybe your links will direct me to how to make those lovely larterite balls! (Haven't checked yet...) But FWIW, to date, while the tank was small, the BEST substrate I have used thus far in my few planted-tank-years is laterite. Or at least that's how it worked out for me.

Originally Posted by BiscuitSlayer

I know you aren't a proponent of boosting CO2 as an algaecide, but the one time I had GDA woes as you do, I boosted my CO2 a bit and it disappeared almost overnight.

Well, you've clearly read my rants about using CO2 for purposes other than feeding plants. It's a little like a UV... IMO if you are using one just to suppress green water, you are avoiding addressing the real problem. Same with overdosing with CO2.

However, that postion is philosophical, not practical. Right now I've got a major GDA problem. If increased CO2 can make it go away and stay away, that sounds nice. The question is... do I to keep it elevated? And if so, how high?

I have a couple of Bamboo (Wood) shrimp that I KNOW from foolish experience have a real problem with 40+ ppm CO2. I've killed them before with that. So, how high does it need to be to get GDA under control? And how high do you need to keep it?

Thanks for the help folks. Really.