Co2 pH KH Questions.
Hi, I just bought my first Api GH and KH test kit. Also using some rather old api ph(low) ive had for about 5 years. I Tested the GH, reading was 3 degree, KH reading was 3 degrees as well. Then i tested my pH, which has me a little bit concerned. I is reading at about 6.0 or around there which would indicate around 90ppm co2!!! Im freaking out. im not sure if the ph test kit is incorrect due to age (does not have an expiration date i could locate, but my gh and kh both have about a 3-5 year life span as indicated on each bottles). None of my fish are stressing though, even the plecos which are generally fussy about everything. I am running about 4-5 bps on a gla gro 1 regulator, 75 gal tank (was having issues with 2-3 ppm shifting co2 levels which caused my ar mini, driftwood and even glass to have a bba outbreak). Any thoughts, opinions or advice would be very appreciated!