The Planted Tank Forum - View Single Post - confused about CO2, ph, kh, etc.
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post #11 of (permalink) Old 02-14-2008, 03:10 AM
jgb77
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Quote:
Originally Posted by chilligirl View Post
Well, last night I added my ferts that came. I added 1 1/4 tsp KNO3, 1/2 tsp CSM + B, 5 tsp bkg soda, and 3 tsp epsom salts.

Tested my water today to see what effect it had. My pH went up to 7.2, KH is now 85ppm, GH is 100ppm, ammonia, trites, and trates all 0, Iron at 0.5.

Is it possible that after dosing KNO3 last night, my nitrates would be all the way back down to 0 today? Or is my test kit suspect? It's a good kit, liquid one by API, and has always worked in the past. The last time I got a positive reading for nitrates was a couple months ago, I was reading trace nitrates (more than 0 but less than 5), before I added live plants. The instant I added plants, those were gone. Are my plants just using that much food?

Is there a way to make a standard solution of KNO3 to test my test kit against? I'm sure there must be...off to read now...
Rex has a way to test your nitrate test kit with a known solution on his site here:http://www.rexgrigg.com/diy-reactor.htm#kit
Hope that helps,
John
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