Since any centrifugal pump can be throttled back using a valve on the outflow, I find extra mechanical or computer technology that can "screw up" to be surpluferous.
I started using Mag Drive pumps in the mid 80s and still had some working in 2010.
I did replace a few impellers, and volutes over that time, some my fault when experimenting with play sand as substrate (way too light getting to the impellers, those problems stopped after switching to heavier PFS.)
The disadvantages of Mags were they tend to get loud (hum) as they age, and are gluttenous suckers electricity, compared to newer technology pumps, and produce excess heat.
As they wore out. I started switching to Laguna pond pumps, less noisy, and less energy use, Also like the big surrounding cage (although chinsy screw ports) that project the pump from debris.

My only bugaboo with them, is that they don't(didn't) have standard PVC threading for unions and valves on the pump.
I started using Mag Drive pumps in the mid 80s and still had some working in 2010.
I did replace a few impellers, and volutes over that time, some my fault when experimenting with play sand as substrate (way too light getting to the impellers, those problems stopped after switching to heavier PFS.)
The disadvantages of Mags were they tend to get loud (hum) as they age, and are gluttenous suckers electricity, compared to newer technology pumps, and produce excess heat.
As they wore out. I started switching to Laguna pond pumps, less noisy, and less energy use, Also like the big surrounding cage (although chinsy screw ports) that project the pump from debris.

My only bugaboo with them, is that they don't(didn't) have standard PVC threading for unions and valves on the pump.

