[gfink]

I also have this problem, but I think it is getting better.

29 [acronym:78b51affdd="Gallon"]gal[/acronym:78b51affdd]
Ammonia, and Nitrites are 0
Nitrates are less that 5 [acronym:78b51affdd="Parts per Million"]ppm[/acronym:78b51affdd].
pH 6.8

My water was very green, I had problems seeing the heater in the back! I did partial water changes, and it would temporarily dilute it, but it would spring back in about 2-3 days.

[acronym:78b51affdd="Local Fish Store"]LFS[/acronym:78b51affdd] advised me to set light to 4 hours. (it was at 9 hours as my basement doesn't get any significant sunlight.)

I also read that phophates can promote algae. So I bought a phosphate test kit and discovered that my tap water and tank had 2 [acronym:78b51affdd="Parts per Million"]ppm[/acronym:78b51affdd]. Right now, I have some seachem phosphate absorbing filter media in my tank, and in combination with the reduced light, the tank seems to be recovering....slowly. The green isn't rebounding as fast, or to the extent it was after a water change. I imagine that it will need a few more weeks with 25% [acronym:78b51affdd="Partial water change"]pwc[/acronym:78b51affdd] every 5 days or so. We'll see.

[acronym:78b51affdd="For your info"]FYI[/acronym:78b51affdd]...I have fake plants. I've read that adding real plants is good, because they will take in and store nutrients, starving out the algae.

I'll try that next if all esle fails, but I will have to increase my light period.