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thank you for all of the information!:))

its about 390ppm

hello:) i'm on the journey of setting up a 53 gallon aquarium (100×40×50cm). i have an eheim professionel 2228 and an aquael model fan-3 plus filter. my question would be, can i keep the following fish in this tank comfortably, or could i do even more? angelfish -4 cherry barb -about 15 black...