hey guys so I've used this 20 gallon long for a hospital tank for quite some time recently decided to kick it up and just go with a frag tank since I've added a rock and sand about 5 months ago all water parameters look amazing phosphates nitrites and nitrates all the 0 calcium around 500 magnesium around 1600 alkalinity around 10 now I've had a huge problem the past 3 months and it is driving me crazy I will attach a photo of my red slime algae in which I cannot get rid of at this point I think it might be due to the fact I am using a canister filter but I am using a canister for a 55 gallon on a 20 gallon so I thought I'd be okay plus there hasn't been any fish no waste or anything in the tank for lights I have been using what I have been told was a 250 watt metal halide I recently purchased a little Fluval 18 watt LED strip mainly because it has sunrise and sunset effects plus really nice blues my question is what would you do to get rid of this algae and spruce up this tank for dirt cheap and I am stressing dirt cheap I will probably build a PVC pipe overflow to a 10 gallon sump I have already but I would curious I like the canister it's a lot cleaner and smaller if I can get by with using it I'd love to I will post pictures in a minute I'm at work thanks in advance

