I've used Mag's quite a bit and they seem to be very quiet up through the Mag 18. The 24 and 36 are a larger motor block and a louder noise category than the others...a much louder hum, corresponding with the increases in power and flow.just wondering about noise and heat output
If your system is heat-strapped due to the halides, then you might be better off with an external pump like Iwaki or Blueline.I don’t think the pump is that big of a deal heat wise either only reason I was slightly concerned is a run halides, so I take heat savings where I can get them!
But if you have the heat budget to spare, then the bigger pump will just make your heaters run less.
For what it's worth, in the past I've actually had the system automation shut the heaters down completely while metal halide lighting is engaged.
Being too aggressive with tweaks can be a problem.It’s crazy inconsistent. It’ll skim beautifully for a week, I’ll do a waterchange and it won’t pull anything out after I start it back up, I’ll have to adjust water and air to get it pulling how I like it.
Basing tweaks on current skimming performance rather than skimmer output can also be problematic.



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