"Gill Passman" wrote in message ...
Yukon wrote:


I had a pincushion drag around a snail shell with
a mushroom on it for months. I also have had them
strip insulation right off the wire of a powerhead and
fry a tank. It was only a 10 gallon tank, but it could've
happened in any tank. I still have urchins in all my tanks, but
I keep an eye on 'em.
I have two pincushions in the tank....don't know if it is a size or species issue.....the pink one (that is double the size of the
other one) is the culprit.....I've now adopted the policy of rescuing the FD when he gets taken for a ride.....the other one is
purple and smaller (but this could be an age thing) - but the purple one never, ever gets the crud stuck to it in the same way as
the pink one does.....

I must admit that I do like them....and they do an awesome job on algae control.....although I understand that there can be issues
once the algae has all gone.......

I like the idea of just keeping an eye on them.....not sure the FD appreciates those hours when I'm out of the house and he gets
taken for his trips....

Gill

Nah, it's good for him. Let him see the world.