algea problem

[Justin_NY]

i have a 90 gallon tank running with 2 mp40 , radion, aquac skimmer ev240, phospahte reactor. my tank has a problem with cyno algea. i do water change 10 gallon a week, but stil have this algea. my nitrate always at 20 ppm no matter what i do. try the slime algea remover but only last for 5 days and they all come back again. the tank been running almost a year now. now , someone in this club advice me to use vodka dosing, which he only hear about it but never try it in his tank.
so i want to know who is using this method?
is it working/?

 

[Clink51]

10g a week wont do anything at this point. You have to find out the reason for the nitrate spike. did you have a fish go missing? backlog of garbage? i'd recommend at least a 25-30g water change. Its not up there but with all that equipment im sure you must have a ro/di Filter. How old are the filters?

The Slime Algae stuff is like a nuke, if thats not fixing it, the cause is somewhere in the tank or the sump