Ok I’ve been this way. It’s bandaid not the answer. First you’ll always have algae. Even those with co2 tank have problems. So what I do is maintain it. SAE really are the best for bba. Thing is while Qting them you have to add something with bba on it and starve them till they start eating it. Once it becomes their diet they will always eat it. Next for the green spot algae you need red cherry shrimp (rcs). First try to introduce into your discus tank. Great result till discus figure out there tasty. So a rcs tank of there own works great. When you want the algae removed put it in with the shrimpAttachment 130796 they will swarm on it. Rcs also eat regular algae as do plecos and nerite snailsAttachment 130797. Attachment 130798. Ottos also eat algae. This whole crew looks good in a discus tank and will keep back much of your algae problems.