sorry everybody, i had a family member die, me and my parents had to go to miami and deal with our problem, i see lots of you guys responded to get some maxi's, i'll go down the order and send out,ship,and yes they all work great, there just covered in coral line algea, they don't have there sucsion cups tho as they don't work after a while, i just hang them from back of tank, and place them in rocks shooting out, if you modifie them, watch out, there powerful., thanks for understanding and sorry again,