Besides reducing flow & being a bit bulky .....they're cool.
My Collonista snails would get inside & stop the rotation sometimes.
I use them on both my returns....work like charms!
That sounds like a great IDEA do you have pics???
No-they work fully submerged But- you only need the opening tip submerged to make them do their thing....less in the water = less ugly to look at!Do you have to keep them out of the water for them to perform properly??
Absolutely not. I doubt a snail could even get inside..the opening is very small.
I've used them since day 1!monkey, how long have you been using these? i have one but never used it because i was told that they stop rotating after a while. is this true?