bring your GH test kit with you and test the water.
I use it for my CRS tank. I have to refill tomorrow anyways so if I get a chance, I'll test again. If I remember correctly, the TDS was very low, in the single digits. The TDS in my tank is around 150-170 using Aquasoil. The vending machines around here are Glacier and they replace/clean the filter every 10 days to 2 weeks and the led display will actually show the last date the machine was serviced.Has anyone seen these things before, these water stations you might find at your grocery store? You can go there and get 1, 3, or 5 gallon jugs filled for pretty cheap. It is advertised as RO filtered water. Does anyone have any experience with this? Is it really RO? I'd imagine they probably don't replace the filter very often. Does anyone with a TDS meter want to go and try it?
I'm thinking about using a bit in a tank. Obviously, I'm not going to go and lug 100 gallons of water around, but maybe just a little.
Lucky cat, gets better water than me!What Halibass said. I've used it to top off tanks with no problems that I could see, but I didn't actually test the water. We refer to that as "cat water" :hihi: as that's what I use in the cat's water fountain. And they do fairly frequent maintenance on the machine from what I can tell.