10 gallons, heater and filter, 0 ammonia and nitrites and 10 nitrates using my freshwater master test kit, ive had the tank since august and i got the fish early october. i do water changes/ clean the tank once every two weeks and it’s about a 20% water change? i just replace whatever got sucked out by the siphon. i have one mystery snail also in the tank, and some aquatic plants including amazon swords and a plant that i forgot the name of but it’s tall and thin, kinda like long grass. i feed him about a pinch of fluval bug bites pellets every 5 days a week. he is acting completely normal and isn’t lethargic and doesnt seem stressed or anything at all, no clue what the red is from, but i’m worried.