ppm

Hello everyone! I've been cycling my 20 long for about a week now, I know I still have a long ways to go. I'm doing a fishless cycle and I threw in a cocktail shrimp about 2days in and I'm wondering if I should remove it? I have about 5lbs of live rock in there and I'm just letting it do its...

I got my refractometer from BRS the other day and noticed that it's blue line doesn't seem straight across. For example, I have it perfectly set at 35 ppm on the right side, but my salinity on the left reads like 1.027 or 26. It seems to me like the reading (if set at 35 ppm) should be straight...