Yeahhh, I got my 10Ks in and now my tank looks great! I only had the 6500s in it and it had that green cast to it. Now it is sharp, crisp and shimmery! I love it. I am not going to go any higher, such as 14K or 20K, I LOVE the light it gives out and I also have the PAR, so I am so very happy with this! Thanks Ron.