How come the Ph will change?

[MisterE]

Look at the tubing that goes from your aquarium pump to the air stone.. EVEN after 1 ciggie that thing will have tar in it... yikes...

I smoke now and again.. YET i maintain KAK diesel status...lol.. lots of running, frisbee, poongazing, dead lifts.. etc....

I know that a sulfur burner with airstones running is a major NO NO..

I don't know exactluy what ciggies do.. but I don't recommend it.. or if you do do it.. put a PH tester inthe reservoir and report back to us..

iloveyou

I do use a continuous PH/TDS meter and before my latest res change, my PH kept dropping pretty dramatically. And that was with RO water and weak (300ppm) nutes and calmag+ about 10 days prior, with plain RO top ups. I'd start the day adjusted to 5.8 and it'd be 5.3 after 12 hours or so.

It's been steadier since the nute change, but I'd sure love to know what could make it drop like that on a daily basis.

MisterE Reviewed by MisterE on 12-16-2006. How come the Ph will change? I have noticed that when I mix my water and nutes I will test the Ph. and bring it to desired measurement. The next day when I test it again I notice it drops a couple points. I check cal on the Oakton tester Pen and its perfect. I've read on the forums to always check and re-check the Ph again and again. Does the PhUp/Down just disappear and disolve in the water? should I even bother to set the Ph of my water a day ahead of using it,or before i leave it to sit for a few days? I use a One Rating: 5