Hnguyen;1006140 wrote: I LOVE red sea tanks, in fact the red sea max s650 is my dream tank (still begging the wife). I've had the red sea max 250 a few years ago and loved it. Lights were more then enough to grow anything. The skimmer on the other hand can be a bit of a headache but it works well after you dial it in. Okay I lie, it works well for a while then acts up on you. I'm not sure how the new s500 skimmer will perform since it's a in sump skimmer but the 250 skimmer would act up and over flow on me every now and then. Pretty much dumping everything it skimmed out back into the tank. Heat was a big issue with the 250 since it was a closed canopy AIO system so a chiller was a most. The s500 has an open top design but still run 10 T5 bulbs so I would assume you would still get a good bit of heat. With all that said, I would still buy red sea tanks. Their design and craftsmanship is top notch and every thought out. I'm not sure how much your friend is selling you the system for, but if it's in good condition and priced right, I would jump on it in a heart beat. The one at pure reef is a s500 if I recall correctly. I asked about it when I was there a few weeks ago.