fablau It's aquasoil over a year old I dose 1ppm NO3 (apparently some of aquavitro synthesis is urea according to the handy calculator) 0.13ppm PO4, and 0.1 Fe, I throw in a couple scoops of GH booster which raises the GH an extra degree. There is KH and GH already present in the tap. I do this once every one or two weeks (or extreme cases 4 weeks) when I do a 30% water change.
Its a low light excel tank. I just do the maintenance, I think the fish get fed very well judging by their fat bellies. There are 15 cardinal tetras, 2 powder blue gourami, 5 stupid guppies, and 6 female and 2 male amanos.
I bumped the NO3 to 1.69ppm and 0.22ppm PO4 this past Saturday.
This tank has almost no algae, a small amount of brush algae on the wood. Compared to my CO2 tank, it just chugs along, the anubias are healthier in this tank than in my EI 20 gallon. I'm pretty sure the tank is doing this out of spite.
The crpypts grow like no tomorrow, faster than in my EI tank, which I found irritating. Rotala is growing painfully slow ever since I hacked it down, and the substrate ran out of gas.