Several weeks ago when I added the water and finally had all the problems resolved, I plugged in the heaters, powerheads and skimmer. But the skimmer wouldn't turn on even though it had worked just fine when I turned it off several months ago. I cleaned it when I first took it offline, but that didn't seem to matter. So, when I took it apart last week, the magnet on the impeller had burst and there was rust everywhere.
I figured I could get a new impeller, but what bothered me what that there wasn't even any rattling noise when it was put together and plugged in. So after weighing my options, I decided to build one; buying one for what I need with room for expansion would be too expensive (plus I've been really wanting to make one since last Fall

.) The other reason I built one rather than replacing the impeller (and maybe the pump as well) was because even if the skimmer worked, it would be too small for 210 gallons of water.
I have had the hexagonal acrylic tank that you will see for over a decade. It originally had tinker toy like things in it and even though I stopped playing with the toys long ago, I kept the container in case it came in handy one day. I used it to house a praying mantis for a while, but have been using it as a fish stuff container ever since. So that's where I got the acrylic container that is coming up.
To keep costs low, I basically took the sketch I posted on the thread: "Let's see those DIY skimmers" and simplified it. Instead of doing multiple venturi pumps with a beckett integration on the chamber, I made it so that the chamer is extended higher than the acrylic container and just bought one large venturi pump (approx. 1000GPH). But I am still setting up so that if necessary, I can still upgrade it with more venturi pumps and/or a beckett system.
At first I wanted to use some clear pipe or create a box out of acrylic sheets for the upper chamber, but decided to use a toilet paper holder instead (it was slightly shorter than I wanted, but it was better than a risky acrlic box). I had pretty much everything on the skimmer done, but then my dad didn't like the idea of using aquarium sealant to attach the upper and lower chambers together (I didn't really like it either, but couldn't really think of anything that wasn't too much work or expensive).
Here is where I got to using the toilet paper holder method.
Bulkheads to be used (1-1.5", 3-3/4"):
Upper chamber:
Collection cup made from 1.5" pipe and a peanut butter jar (before jar was glued and sealed to the pipe):
Upper chamber with collection cup:
Water input to the skimmer comes through the lid of the collection cup (this image is without the vinyl tubing):
Bulkheads added to the lower chamber. The lower two are for the venturi pump and the upper one is for the drain:
This is the original pump placement that I wanted. But with a larger pump, I couldn't figure out a way to keep it up without putting too much stress on the bulkhead. I could have used straps (metal or plastic), but there isn't a gurantee that they wouldn't slip from the constant vibration from the pump. I could have made a miniture table for the pump to rest on, but the pump isn't smooth on the side that it would rest on and even then, the table would have to be perfect otherwise it won't work properly:
So I decided to let the pump rest on the ground. Here I'm checking the pump fit and placement to make sure I did everything right:
Both chambers without any piping added (I took this before I added the bulkheads, but wanted to show this one last.):