Question about Bestway Solar heating panel

I had 2 solar mats. My pool was round. 3.75 m in diameter and about 70 cm deep. I connected the mats to a Gardena submersible pump, which I ran every 30 minutes. That brought about 3 degrees per day. It was really good. I can only recommend it. Don't buy the mats from Intex. They are cheaper, but they break after 2 weeks.