Looks like dyno, excess nutrients would be the cause. What test kits are you using ? Could be reading low because the algae is using it up. I had it when I first cycle tanks, but I found it went away faster by using a tooth brush and scrubbing it off the rocks. I either siphoned it out or let it go into the over flow and my skimmer got the rest. I then continued with water changes and I haven't seen it in close to two years on the one tank
id of algae and how to get rid of it
I have a nuisance algae I can not seem to remove from my aquarium.
The parameters of my tank are as follows pH 8.3, nitrites undetectable, nitrates less than .2ppm, calcium 420 ppm, ammonia undetectable, alkalinity 9 dKH, sg 1.023-1.025, phosphates undetectable, temp 78 to 80 degrees F., lights are 150 metal halide 12000 k bulb on 10 hours with 2 supplemental actinic bulbs. i use the new Red Sea pro kit and Seifert test kits. I have a bare bottom tank and use ro/di system water.
I do weekly water changes of 10 percent. Any help with id would be appreciated.
The parameters of my tank are as follows pH 8.3, nitrites undetectable, nitrates less than .2ppm, calcium 420 ppm, ammonia undetectable, alkalinity 9 dKH, sg 1.023-1.025, phosphates undetectable, temp 78 to 80 degrees F., lights are 150 metal halide 12000 k bulb on 10 hours with 2 supplemental actinic bulbs. i use the new Red Sea pro kit and Seifert test kits. I have a bare bottom tank and use ro/di system water.
I do weekly water changes of 10 percent. Any help with id would be appreciated.
