Please need some advise
Hello all and thanks for any help in advance.I have just setup my 200l marine saltwater tank again after a year. The old rock and sand has been sat in tank with saltwater for this periodMay be a bit long but will list what i have done and where im at.I cleaned all old rock and sand with ro water properlyI then put rock and sand backI made up the water and added to tank.*So i then obv needed to start the cycle process so i boughtfrom the fish shop a new piece of cured rock and say a cup full off sand to start the process.Day one of cycle all ok ammonia up 0.50ppm nirite 0 nirates 15ppmCalcuim 480ppm ph 7.6 and Ch 10dkhBUT day 2 today i have come to my tank after beeing out for the day and one of the old live rock is BLACK i have checked it and i CAN scrap off the black. My reading are ammonia 0.32 nirite 0 and nirates 7ppmI just want some advise on the black rock hope have provided enough info and thanks for any advise in advance
Hello all and thanks for any help in advance.I have just setup my 200l marine saltwater tank again after a year. The old rock and sand has been sat in tank with saltwater for this periodMay be a bit long but will list what i have done and where im at.I cleaned all old rock and sand with ro water properlyI then put rock and sand backI made up the water and added to tank.*So i then obv needed to start the cycle process so i boughtfrom the fish shop a new piece of cured rock and say a cup full off sand to start the process.Day one of cycle all ok ammonia up 0.50ppm nirite 0 nirates 15ppmCalcuim 480ppm ph 7.6 and Ch 10dkhBUT day 2 today i have come to my tank after beeing out for the day and one of the old live rock is BLACK i have checked it and i CAN scrap off the black. My reading are ammonia 0.32 nirite 0 and nirates 7ppmI just want some advise on the black rock hope have provided enough info and thanks for any advise in advance
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