Are you using them to test the TDS
of you SW
? Never seen that before. Get some TDS
calibration fluid and verify the results. TDS
meters need to be recalibrated from time to time any way IMO
I just verify the TDS
of my RO
water. I hope your tap water is not that high ...
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,