and here's why my tank was a very high lit tank. according to the sticky about lighting, each bulb was giving me 65 micromols of PAR, at about 18" off the tank's bottom. multiply that by two bulbs, and you get 130 micromols. that EXCEEDS the high light category, and is not even shown on the chart.
when i had 4 bulbs running, it was 260 micromols of PAR!!!!
the chart tops at 120 micromols for high light. i had more than 2x the recommended amount for high light. that is why i was hit with a massive algae problem in record time
when i had 4 bulbs running, it was 260 micromols of PAR!!!!
filtration cannot remove green water, unless youre using a diatom filter.