thanks for the all the input!
What I have in the tank are 6 Polypterus bichirs (6-7inches long), and I feed them: frozen beefheart, froz bloodworms, cut-up earthworms, frozen krill, shrimp pellets, and occasionally live feeders/ghost shrimp
I used to feed them 2X a day in the middle of my algae woes, but after talking with some other hobbyists, I have cut the feeding down to 1X per day, and will eventually only feed 1X every other day.
I do not add anything else to my tap water other than stress coat, aquarium salt, and aquarisol.
I am going to try to do the daily 25% water changes and monitor the PO4 levels. I have reset my timer to only give 7 hours of light (vs. 10 hours from before) and have reduced the watts to 100W/75g (1.25 WPG). I have scrubbed the walls of my tank. I have moved all my java ferns to my hospital tank where I know the phosphates levels are low, and hopefully, the bristlenose pleco and american flagfish in the hospital tank will take care of the bba/hair algae.
As for my 75g tank with all the algae problems, is there anything else I can do besides the daily water changes? To summarize, I have done the following:
1. reduced lighting to 1.25WPG
2. added Kent's phosphate absorber to my filter
3. scrubbed off the alge from the insides of the tank
4. reduced the feeding of my fish to 1X per day
5. moved some heavily infected Java ferns to a hospital tank, leaving on the rooted plants in the tank (all have hair/bba)
6. ordered the green light stump remover and will start dosing with nitrates so eventually (over 3 weeks?) I can get the ratio of phosphates/nitrates = 1/10ppm.
7. of course, the daily water changes
I'm hoping something is going to work... abc