Thanks everyone...The tank has such bad algae problems right now I was ashamed to post it. Again the red macros are really taking off, but they are not as bright a red as in the Kuda tank, yet they are the same macros. The horses are doing great, and that's the most important thing. Until today I hadn't noticed they were all now almost the same size. The male used to be twice the size of the others, and he is growing as well. It hasn't been very long. They were added on April 19 and 20....it's only June 25th.
So I figure I will just keep doing the water changes and wait for the macros to out-compete the algae for food. ...and wait for my potbelly horses to get bigger and bigger.