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Hi please can anyone help here. I have a new tank I am setting up and plan to keep cherry shrimps. The tank is a Fluval Flex 57 with an upgraded light for better plant growth. I added Fluval Plant and Shrimp Stratum Aquarium Planting Substrate and then filled with RO water re-mineralised with SaltyShrimp GH/KH+ and a small pinch of fish food I then added a few plants on the 8th August (Dwarf hair grass, Java moss, Brazilian micro sword, Rotala rotundifolia and Reni ) and went on holiday, my readings were (using API freshwater test kit) Temp = 21.6C TDS = 255 KH = 3 GH = 10 PH = 6.6 Ammonia = 0.5 Nitrite = 0 Nitrate = 5 I have just returned from holiday have some very fine algae growing off of one of my plants and tested the water with the following readings Temp = 20.8C TDS = 242 KH = 0 GH = 8 PH = 6.6 Ammonia = 0 Nitrite = 0 Nitrate = 5 A couple of questions Should I worry about the Algae? remove, cut down the lights or just leave I'm confused why my KH has dropped to 0 please can anyone advise.