Here is the link, it's near the bottom of the page...


Calculators and Tools. Taking suggestions for other online calcs.

I always have some amount of green spot algae and gda in my diy co2 tank, I think the fluctuations in co2 cause this. A pleco keeps the tank pretty clean for me though. I've tried adjusting ferts and it doesn't really help, I'm sure it's the co2. It might be the same with your tank, but the extremely high lighting will only make a co2 fluctuation issue even more difficult to deal with than it would be otherwise. I have 2 - 40w odno on that tank, it's a 32g. When I went from no to odno, there was a significant increase in the speed at which the algae would grow but my pleco keeps up with it well. The ferts seem to prevent algae from forming on the plants themselves, but it will grow on decorations and the glass. I can't imagine what would happen though if I doubled my lighting again.

What exactly are you adding when you say 3.5 ml of nitrate and 2 ml of phosphate? Do you know how many ppm's you are adding?

So I ajusted my ferts to this after VaughnH post nitrate 7 ml=7.56 ppm, phosphate 3 ml=1.59ppm, potassium 1\8 tsp barr's gh booster 1\4 tsp (after water change), plantex 2 ml, iron 2 ml=0.2 ppm all is being dosed daily except gh booster. Ferts are dry ferts from Greg Watson's site. Nitrate is Potassium nitrate, mono potassium phosphate, potassium sulfate(only dosed dry) all my ferts I mix in water of 250 ml and x fert. I used the calc from Chuck Glad's site for my calculations. So for every ml I add I get N=1.08 ppm, K= 0.53 ppm, iron=0.1 ppm per 10 gals of water. If I'm wrong here please correct me, cause I use the same bottle on my 29 gal also. Ferts for 29 gal are as follows N 20 ml, P 9 ml, K 1\4 tsp, 3\4 gh booster, plantex 6ml, iron 6ml. The 29 gal has 4.7 wpg of cf lighting, co2, and has very little algea. Wpg may be off might be 4.2 wpg don't remember what watt the other 2 bulbs are 1 is a 65 w and other 2 are smaller I think are 36 w. Thanks for the link.