Flow rates intrigue me. I'm about to spring for a mat, and I'll be putting it on my roof the OTHER side of the pool from my pump. This means I can't easily use my pump system. I'm planning on using a submersible pump (kind of like a cover pump) on a timer to run it during the day. These aren't good for terribly good flow, but then again, they are cheaper than the pool pump (I don't use the pool much, and it's mostly covered, so I get by very nicely running the pump and filter about 90 minutes in the morning and 90 minutes in the evening).

So, the question is, will I be killing my efficiency with this lower flow? And, I am a degreed and licensed mechanical engineer, so I fully understand and agree with the statements that the lower the temperature rise, the higher the effectiveness.

Thanks,

Harry