lol I knew algue would become a problem, I probaly should get a pleco. As for heat, no it isnt heating up the tank. For the k rating, 65 watts 6500, and 65 watts 10000.
I do have c02, and I got the lighting for plants, its a well planted tank, and btw you have my dream, 13 clown loaches, that is awesome. As for otos I have a jewel cichlid in my tank, I dont think otos could survive when he gets older.
You can also go for some amano shrimp they also clean algae well. Right there are 7 inside the other 6 is in a quantine tank treating there internal parasite I hope they get well soon.