Yeah I have a hydometer. I have the R/O system, but I have a broken hand right now and cant really install it with one hand.... As soon as I get this cast off I am setting up , my 37 gallon to do its cycle and setting up my R/O fliter to auto fill the big tank. Just HARD to do when your right handed and right hand is broke! :grumble:
They are actually really sensitive to touch if you touch it I have a green one it will close up randomly after snails touch it and sometimes I have no idea mine has doubled in size since I got it about 9 months ago. Toadstools are cool.