Do you mean 2 150W MH bulbs? When you got the frogspawn, do you remember what kind of lights it was under? If it was under very dim lighting and now under your MH that may be an issue. When I transfered my frogspawn from 144w pc lighting to my dual 175w mine lost some of its color for a few days I have a 24" deep tank, I moved it dead center and on the sandbed and it's now happy as can be.