It is a tank in the planning stages-75gal with an open top, 30-40gal sump, 2-150 MH Pendants , and would be located on the second floor of my house, which stays a little warmer in the summer even with the air on. I just have a feeling that it will become to hot with all these factors. I know it says for up to a 55gal tank but I wondered how well it would work on this setup because I don't want to spend a lot of money if I donââ"šÂ¬Ã¢"žÂ¢t have too. Let me know your opinion. Thanks