I have a 90 gallon tank. I have 3 VHO lights over it. They are rated at 110 watts each for 330 watts total which in turn equals about 3.6 watts per gallon. I am running a pressurized co2 system with about 2 bubbles per second which is diffused in the water with a Red Sea reactor 500. I have two Canister Filters on this tank which are and XP3 Fillstar and a C-360 Marineland. I also have a small power head in a corner of my tank to help out any dead spots. I have a ph controller which turns on my co2 in the morning when my lights come on. My tank values are as follows. Ph which fluctuates from 7.1 in the morning to 6.7 when co2 is on (my controller shuts off at 6.7 about three times a day). My kh is 3 dkh, Nitrate is 5, Phos is .5, Hardness is 3 and I dose seachems plant line. I use the chart they have online as a dosing schedule. Why do my plants just not go crazy and grow. They seem stunted. Oh I also have a seachems root tabs and I have eco complete plant substrate with a hydor heater cables on the bottom of the tank for heat. I am battling black beard algae on my anubias and my amazon sword has a lot of blackish algae that grows on it.(this is not bba). My hygrophilia grows pretty good though. Please help should I cut down on the light or should I replace the bulbs as they are about a year old. I have heard if I cut down the light then co2 would be easier to maintain. I just need peoples advice on what I should do. I also run my lights for 10 hours a day. Please take a look at my tank on view user tanks. I appreciate you taking the time for advice and for looking.