Koi Diary 60 - Wall Skimmer modification to 3"

Finally the day I've been talking about for weeks, SKIMMER job!! Arghhhhh, now having doubts as to what im doing with it all! Having a now possible rethink on the whole, sieve & bead combo, may run skimmer line to the drum and have the heater the other side of pond but higher up, I dont know?? lol Anyway worst part is over, although seem to have uncovered a leak from the skimmer somewhere! Not huge but theres deffo water down the wall, joy of joys!! Thanks for watching Andy