So, the day started out with drilling the
sump. I have never drilled acrylic - only glass - so Mike to the rescue. He used a hole saw - drilled a pilot hole - and used olive oil to lubricate. Pretty cool.
He drilled 4 holes total -
Hole #1 - 2" hole for a 2" bulkhead for the Reeflo Dart pump on the return side. This was the toughest hole to drill apparantly. The bigger you go I guess greatens susceptabiltiy to crack the
sump. The drill wanted to jump often. Olive Oil helped and was only used for this big hole. Whew -
sump in tact

Nice job Mike! I can tell drilling the other holes were secondary as we had one shot to get the 2" bulkhead in as only one
sump in the house. It was definitely a relief and the drilling continued. You can see the 2" bulkhead fastened to the
sump in this shot:

(ESHOPPS - 37 gallon capacity - Reef
Sump)
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Hole #2 - 3/4 inch bulkhead - possible chiller in the future on the return side
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Hole #3 - 3/4 inch bulkhead - used for an external pump - I will be plumbing a
refugium or a
frag tank - have not decided yet - still planning it out. You will notice a bit more than 3ft on the right side of the tank for a 24-26" custom cube or 45 tall cube
refugium. I wish I could have done it all it once but money talks and everything has gone towards the main display. I may just end up plumbing the 30g cube in, but I know it would be better off as an ongoing quarantine tank. More to come here...
You can see Hole #3 and hole #2 connected to a ball valve here:

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Hole #4 was a surprise - the intention was to use the mag 7 as the feed pump for the
skimmer "inside" the
sump. I figured why not, so the hole was drilled for another 3/4 bulkhead right where the drain lines come in. Problem is the pump after glueing was going to hang off the back of the stand by the length of the pump. I jerry rigged 3 pieces of 2 x4 that set the mag 7 up right where it needs to be.
Easy enough. The
skimmer called for about 350gph to operate optimally. Using a mag 7 - the flow needed to come down and putting it in the
sump would have meant heavily restricting the pump with a ball valve. I still have a ball valve on but have it kept wide open. In the
sump a mag 5 would have been best to keep the flow down feeding this particular
skimmer.
Skimmer running well. More to come later...
So some flexible Spa Flex
PVC was line against the back of the stand with horseshoe clamps reducing flow just enough for the
skimmer to do its thing. I would say about 4-5 ft head loss - have not measured it yet. The flexible
PVC Mike uses is excellent - bendable but sturdy providing a much cleaner set up than I have seen with most rigid
PVC setups - more to come here as well...
So there you have the four holes. Mike did an excellent job on the holes and made it look too easy. All we had left to do is plumb it...