Umm, your supposed to hang the dry side with the wire up. Mine would make a loud rattling noise then fall off if I hung them that way. After hanging them correctly, no noise and they have yet to fall off. Either way that noise is not normal.
With both of my MP10s (new and old one) I've run them both in both orientations, and performance was identical. Performance should be identical. The internals are a perfect cylinder, and any imbalance would throw off performance in either orientation.
The reason that Ecotech recommends running with the cord above instead of below is to make it more secure in case it does lose magnetic cohesion, at least it's supported from above, so it's less likely to drop. Also, it's less likely to just drop straight to the floor.
But since you made the comment, I've mended my ways, and attached their zip tie anchor to the side glass, and suspended the cord from above. On $$$ equipment I'll do my best to treat it the best. Gotta keep it silent!
I was away for the weekend, corals are still brown. Even my beautiful ponape birdsnest is browned out, with some bleaching in the lower branches. I still blame lack of flow for a week. Scary to think that without intense flow this happens... Nothing else really changed, and I've checked all of the main parameters twice.
I turned the refugium light back on, hopefully I get some algae growth back there which will offset whatever it is that is browning out the corals. I suspect that despite testing no nitrate or phosphate, that the net nitrate/phosphate increased with lower flow because things settled more and didn't get skimmed out as well as before, so I'm hoping the algae will take care of that.
I also prepared my top off water last week with 2 tablespoons of kalkwasser powder and 15mL of vinegar, a supersaturation of kalk that adds some carbon dosing as well. My pH is already staying higher now than it was last week (it was dipping to 7.7 or so in the mornings, now it's bottoming out at 7.9). Ca and Alk are both stable around 380/8.6 (totally ballparking, but I do have records at home).
If my colors don't start coming back in the next two weeks or so, I might add a dosing pump with vodka. ALWAYS MORE TO DO!