robchuck
Active Member
I used tap (Lake Michigan source water) for quite awhile with no problems, other than I couldn't keep nitrates below 20. I moved about two years ago and kept using tap (same source water as old house-Lake Michigan), and about 9 months ago, I started seeing my nitrates creep up, even though I was doing water changes, and started to see nuisance algae. I bought a RO/DI unit about a month ago which came with a TDS meter; the tap at my new house read 540ppm! I've about got my hair algae trimmed back to nothing, and the only change I've made is switching to RO/DI water. In short, my experience is that using tap water is a real crapshoot. I used basically the same tap water, but in two different houses, and had two different results.