I am not sure about Clown and other larger loaches, however Kuhli Loaches get along with these snails fine. I have a 29 gallon with five Kuhlis and they have never bothered the snail or the babies.
Keeping the water level as high as possible with no gap will help to discourage breeding as they like to leave egg nests at the water's surface. These will appear as jelly-like sacs that later drop to the bottom.
Interesting that Kuhlis are okay, but disagree with not leaving a gap as AS' are also great indicators of water quality and if water problems occur, the snails at least can escape the water. Especially important if meds are used the snails don't like.
Hi Andy - welcome to FK Never heard that one before I have heard of a goldie eating an applesnail and living to tell the tale (not nice for the snail though!) so I think whoever told you they are poisonous to goldies may be a little mistaken. I can think of at least one member on FK who has kept them with goldies We've got a 'sticky' on them with more info: http://www.fishkeeping.co.uk/modules/ ... php?topic_id=2088&forum=3
Of Loaches and Snails