jdw the cinder blocks are just stacked on each other i did not use anything to attach these the good thing about this pond is that its totally removable..
On a sad note i lost quite a few fish we had a cold snap for a week in the lower 50's so now i will have to rebound i just hope my buffaloheads made it i haven't seen any floating bodies in there so i am keeping my fingers crossed we will be back into the 80 and 90's in a couple of days..