Yeah. I gutted the old bog last week. It was overflowing with plants and I used too small of pipe so I was just going to dig it out and replumb but there were some additional issues so I bought the tank on sale on Sunday and just finished pulling all the concrete blocks last night. Hopefully today after work I can do a mock up of my plan.
I really hadn't planned on doing all of this now but... well... I am now.
When is there ever a good time? Our pond is going into its 5th season. Three years ago, decided to make a bog. Have made "0" progress to date. Two years ago, did a major renovation [to battle collapsing, clay soil]. Still haven't done a darn thing to the raised edging.....looks pretty tacky. But I'm just lazy. I certainly can't say that about you, girl!!
I used 1-1/2" PVC for the turtle-bog, and instead of a stream or waterfall, the return-to-pond is via 4" PVC. As it is, I have to monitor the water level in the bog closely [mine has a large, open area in the center, like a pool for the turtles]. I doesn't take much, root-wise to clog the output drain and cause the bog to overflow. When I notice the pond level dropping, that's the first thing I check. When I make the "real" bog, I'm using 2" PVC as the underneath distribution. This bog will be raised a couple of feet and my plan is to have the water return via a stream/waterfall. So, can't WAIT to see what magic you do with yours!