Pond Boss Forums GENERAL QUESTIONS Pond Boss DO///TEMP///PH METER

Just a FYI. I don't know about the other meters, but the YSI requires that the probe be continually moved back and forth or up and down to continually have new water flowing over the O2 membrane to get a good reading. If you let it sit in one spot, the O2 reading keeps dropping. The sensor is stored in a chamber on the unit that has to stay moist or the membrane will dry out and become useless. A replacement membrane kit is around $50 and you get 6 replacements.

I marked the cable in 1' increments with electrical tape to have an accurate way to measure how deep the probe is.