Robert I've had the Mother for about 8 years.It is about 3" when inflated at the moment.It is in a fine mesh filter bag,as I don't want it to attach to any rock work.I'm sure it will be a bit larger,once out of the filter bag.
Rogger,if Robert does not take it I'll let you know.If I get another split I'll let you know also if you want.Thanks guys.