After I get the sump built, I need to:
1. Build and paint the platform under the tank for the sump
DONE
2. Cut out the acrylic for the ghost overflow
3. Glue the overflow
4. Drill holes in the tank for the overflow
5. Drill holes in the tank for the returns
6. Cut and glue all the plumbing for the drain and return
Looking back, I should've done this when I built the stand, it was so much harder to cut the plywood to fit.
Got the sump outside for a leak test, I filled each section up and checked for internal leaks as well as external.
Then I filled the sump to about a half inch from the top and let it sit for 5 hours in the baking sun
I'm happy to report that the outside was bone dry. I siphoned the water into the pool, no need to waste it. Then it made its way to the garage to have the edges routed flush (no pictures of that)
The sump measures 60.25x24x14.5, which comes out to 90 gallons when full. With the baffle heights it's only going to have 55 gallons running through it at any given time.
For me this next number is very important, the sump can hold an extra 35 gallons, in the event the return pump shut off thus allowing some of the main tanks water to drain/siphon into the sump. In the past I have experienced floods due to the perfect storm of a clogged anti siphon hole drilled into the return plumbings loc-line and for what ever reason the return pump was shut off, for a feeding schedule or a power outage. When that happened, the tank water continued to drain into the sump until the siphon was broke, usually wherever the end of the loc-line was in the tank (I always had it a couple inches below the water surface). That resulted in a flood. Of course the main problem was that the sump was too small for the tank. This time I made sure that there was going to be plenty of extra space in the sump to accommodate the water in the likelihood that this event occurs. 35 gallons is 11.6% of 300 gallons, which means that the tank level would have to drop almost 3 inches before there was a flood. All I have to do is make sure that the loc-line doesn't go deeper than 3 inches past the water surface. Wow! talk about getting into the weeds!!!
My daughter helped me set the sump in it's final resting place:
Water flow is a basic horseshoe pattern, water will be returned to 2 filter socks in the front right and travel left to a 23"x11 3/8" chamber that can be sectioned off with removable baffles, then to a 15 3/8"x24" skimmer section, where it turns back to the right into another 23"x11 3/8" chamber that can be sectioned off as well, finally to the bubble trap and into the return pump section. All those vertical slots are for removable baffles so that I can section off different chambers for chaeto and siporax etc. Seeing that it takes 2 days to cut slits into 3/8" acrylic, It's going to be a while before all the removable baffles are cut.
Final word, I now appreciate and understand why sumps are so expensive. I was quoted almost $1500 for this custom sump, I spent $430 on 2 sheets of clear 3/8" acrylic, used an entire bottle of weldon 4 and tube of weldon 16. It took me 4 days to cut, joint edges (for a perfectly straight edge), glue each piece together, leak test it and route edges flush. That's a lot of time and effort and almost worth every penny of what was quoted, I'm just glad I am skilled enough to do it myself. It's not as pretty as most of those custom sumps but mine will function just as well as any of them.
I hope you enjoyed this post, now I have to turn my attention to step number 2....