Experience is the best teacher--mean teacher though. Today I had Lesco Eliminate in the Permagreen Ultra tank. I added some Proxy growth regulater (use rate is 5 ounces per 1000 sqft). Ick! It formed a heavy precipitate. Slushy white stuff. Plugged nozzle screens. Took about an hour to bail out tank with measuring cup and clean up residue. Put the milky solution in skid sprayer where it seemed to work ok at high volume. Once cleaned out Permagreen ran fine. Checked the voltage at one point--13.2--but later on the electric pump had a little trouble starting, overheating maybe? Then ran fine.