Hello Autumnsky.
First off. the chiller is an AquaEuroUSA MC series 1/13th HP model. Yes..the pumps are the cause of the extra heat in the tank. I read several posts from 130 owners saying that the skimmer pump ran hot and was a known cause. I contacted Red Sea and they sent me a new pump but that really didn't solve the problem. So, you have the return pump, skimmer pump, and now the chiller return pump all creating extra heat in the tank but the chiller takes care of that just fine. As for the skimmer, it works great once you get it dialed in. Takes plenty of junk out of the water. The only problem is, that sometimes for no reason at all, it decides to go crazy and flood over the collection cup. So far, it's been working great since I put it back in. Here's some more pictures of inside the cabinet. Didn't notice how crammed it is inside there until you take a picture. In between the wavemaker control and the ATO control is the cabinet fan control.The fans come on at a preset temp and go off at a preset temp as well.