You've got a lot of light, and your tank is on the large side. You might have
trouble getting enough CO2 into the tank with DIY, given the amount of light
and the size of the tank.

I suspect you don't have enough CO2, since your pH is 6.8 with peat filtration.


The tank is heavily planted with Crypts, Valenseria, Amazon Sword, and a
few other lil goodies.

You need some plants that grow faster, to absorb nutrients from the water.
With as much light as you have, you need a lot of plants, at least some of them
fast-growing plants.

You don't have any algae eaters in the tank, either. Algae eaters alone won't
solve your problem, but they'll help.

You don't say what kind of fertilizer you use. With that amount of light, you
need to fertilize.



Leigh

http://www.fortunecity.com/lavender/halloween/881/