Hey everyone i am starting a redo because liner leaked and drain was cracked by a friend slipping on algae and stepping on drain, anyway thought it would be a good idea to make it 2 feet deeper from 4 ft to 6 ft and put 2 bottom drains in ,only had 1 before also going to cap off old tprs and run 3 tprs instead of 2.. u can see the depth before digging by the hieght of old tprs. Pond will be just a hole in dirt with underlayment and liner like it has been for 8 years and held up pretty well as there is no way to bring equipment in to yard there is just no room . Top perimeter of pond measures 26 ft x 18 ft x 6 ft . deep i figure around 9 ,000 us gals im prob going with an RDF and looking to add another skimmer down far right side. any other suggestions would greatly be appreciated..