ok i started to change things on friday , had an idea to move and raise the tank , and created some pipe work to hold the rock ,
i see every one drilles holes in the pipes so you dont get any standing water ,
what i did : i drilled just live every one else but i'm going to run a power head on it , so for the caves i want to do will always get a blast of water
and no standing water in pipes ,
some more pics :
and it works
