UPDATE!!
well after a week things are looking good
removed all the snails i had 14 astrea and 1 mexican and replaced them with some hemits. some of the snail's did have the parasite snails on them...
every morning before the lights come on i inspect the clams i am still finding about 1 a day and I am really shocked at how small they can be alot of them are this small , no joke super small white baby snails...
the great news is the clams look great just to say a scary number since the first one i have probably pulled 30+ off the clams and about 5-10 off the glass....
i fell very fortunate that i was given some good advice on this problem
Thanks Barry