Hi, I'm new to this forum.
Please identify my algae and suggest a remedy.
It doesn't seem to be hairy like the BBA pictures. Is it BBA?
(The water is cloudy and there are black rocks on the leaves only because I changed the water today.)
How do I fix it?
Also, the plants have not been growing.
50g tank, 83 deg. (Discus likes it warm), >2 years old, 0 ammonia etc, eco-complete substrate, only two simple corner filters. The algae got bad when I left the CO2 injection off for a long time and got lazy about water changes. The last few weeks I did 20% water changes once a week with a few drops of Flourish (comprehensive suppliment, not Excel) and a cap full of Prime.
CO2 has been on and self-regulating to 7 ph for over a month now. KH was <1 over the last few weeks. I added some baking soda the last few times I changed the water. The KH went up to 2.5 and the CO2 has been running continuously this week trying to get the PH down from 7.6 to 7. I changed the water today and did not include baking soda. The PH is still 7.6. CO2 in the tank is about 1.9 ppm, not high enough. I suspect that my diffuser is not effective enough. No algae improvement.
2 light bulbs are on a timer for just two hours a day. One bulb is white (10,000K?) and one was Actinic. I changed the Actinic bulb to a 65,000K 96W bulb last week. The old bulb that is still in use isn't very bright compared to the new bulb that is now in use next to it. My guess is that it is about 2 watts/gallon now when on. No algae improvement.
Today I started adding Flourish Excel... a generous first dose. I noticed that the plants started producing oxygen. I haven't seen that in a while. That is the first good sign. I have had good luck with Flourish Excel in the past. I'll stick with that plan for a while.
If the algae doesn't improve then I'll consider dipping the leaves in bleach for 3 minutes.
Would you do anything different or more drastic? Thanks