What's the lowest drilled hole for? Haven't seen that before.
And you probably won't ever LOL.
The tank use to be a sump for a 180G. That hole was for the external return pump when it was a sump. The right side was a refugium, left side was for the skimmer and both sides overflowed to the center section and the return pump was connected to the hole. I have a build thread in the Huntsville forum if you want to take a closer look.
What I am going to do is connect a 1 inch bushing to the 1.5 inch bulkhead that just came in and have a 1 inch line come directly under the stand and connect that to a gate valve. Then I will put a 90 degree elbow at the end. It can then be used for water changes or filling frag bags. At first I thought about just capping the hole and not use it for anything, but I wasn't able to find a bulkhead that didn't have a hole in it.
I guess I could have gotten a threaded bulkhead and cap, that would have worked.
Thanks for asking
Randy
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