mgm53 Posted February 19, 2016 Report Share Posted February 19, 2016 Using an inexpensive PH pen dipped into the shrimp tank it reads between 11 and 13. If I put tank water in plastic cup, reading is 7.6 which I expect. Reading pen dipped in 2 other tanks reading is 8.2, spot on. Any explanation? I disconnected heater and sponge filter in case that might be it. No difference. It makes NO SENSE. Quote Link to comment Share on other sites More sharing options...
mgm53 Posted February 19, 2016 Author Report Share Posted February 19, 2016 Just found the problem. New beamwork LED light. With light on (either 6500k with blue or blue alone) the pen shows error. Light off reading is 7.6. NOW I'M REALLY CONFUSED!! Quote Link to comment Share on other sites More sharing options...
Lyana Posted February 19, 2016 Report Share Posted February 19, 2016 Weird, my ph pen works fine wth my finnex lights on. Quote Link to comment Share on other sites More sharing options...
mgm53 Posted February 19, 2016 Author Report Share Posted February 19, 2016 The 2 other tanks have diy led lights. They have stick on strips with blu, red, cool white, and rgbw combos. And again the don't interfere w the pen. Quote Link to comment Share on other sites More sharing options...
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