Wow, a full year after I first filled it! It could be any number of variables. I recently put a few more fish in, and a month ago I added some hornwort, anachronis, and hyacinth (very little of the first two and they haven't really grown,) and it has been very hot.
Anyway, a few days ago I noticed a green foam collecting on the surface near where the pump outlet churns it, and when I looked down into the water, it had started to clear. Now I can nearly see my white pump housing at the bottom when the sun hits right. Strange, but I'm not complaining! Any explanations out there?