Any updates? Good looking tank!!
Thanks for following. Not much positive at this point, unfortunately. Tank did great for first 3 months, then started the general decline of the inverts. Long story short, don't buy these heat exchangers. It worked flawlessly, but ended up leaching very low-level amounts of metals into the tank. I caught it early on, and lost maybe 3 frags, but things have been slow to come back to 100% normal. I added some more SPS 4 weeks ago, and they are doing fine, but I'm guessing it'll be 6 months before the initial 30 frags really get back from the contamination. I have added a few fish, and have more in QT, currently. All fish are doing very well.
Moving forward, I will still likely go back to a heat exchanger, as I plan to upgrade in 5-7 years. I have looked into PVC/HDPE options, or going with a professional grade titanium tube/shell Hx, they're just a larger investment.