cane76
Fish Aficionado
ok i rinsed out my blue gravel in the garden for an hour with a hose until water run clear.thinking it was fine i put it in the new tank and filled it up with water.when i woke up and had a look the water had a hint of blue and a blue film on surface.is this dangerous to any future fishies??should i empty it and start again??or will doing water changes sort it out??