PH ?????

[barley pop]

what changes the ph in the tank ????


as some of you know i am looking in to getting a ray so i did water test today and came up with

Ammonia = 0
Trite = 0
trate =5
all good # since i have not done the water change this week....

then i checked ph
Tank PH 8.4 - 8.8
so i was courious and checked tap PH 7.4-7.6

what makes it go up so much ????????

sorry if this is a dumb question but i had to ask

 

[brianp]

Certain types of sand or gravel can elevate the pH. For example, certain brands of "playsand" are notorious for this. You can nail this down by setting up two small containers of water...one without substrate and one with. Let them sit for a few days and then take pH readings.