Sand is browning up Help Please!!!!

[Moonlightreef]

Its possible. Normally bottled drinking water has phosphates added for taste. If you're going to use bottled water use distilled.

the reason i asked cuz i use kalkwasser for keeping my parm at check for now and sometimes if my 5g ATO jug is less the 5g in there i add some bottled drinking water . So that can also adds phosphate ?