How wet is too wet?

[bodah]

I built a couple of SWCs out of things that I had around the house, and they seem to be working, but the soil seems really wet. Every time I check it, I think that it is too wet. It isn't sopping wet, but just feels like it might be too much.

I haven't planted anything in them yet, but I have been keeping an eye on the moistness of the soil until it gets warmer here.