Read if you use/used kick ich please
If you have used this I have a SIMPLE question. The bottle has a "built in" measuring cup of sorts. There are two caps.
How do you fill this measuring device (To measure litres)? I tried tilting the bottle, twisting it, etc. but it doesn't fill up.
125 Gallon Reef Aquarium, Live Sand, 150lbs of Live Rock Chaeto in Refugium