Just got the Bulk reef supply dual reactor. In 24 hours my PO4 is down to .03 from .06 ( Hanna Low range meter) . My water is super clear from the carbon. Not sure how much of it is the reactor that is better than my TLFishies reactor or the carbon & GFO is that much better but I love the new reactor and media of the above. The Reactor: Connections did leak a little while you are getting them into position but once set they are not leaking. Could be operator error just had to tighten things a little extra. Time will tell there. I would definitely keep it in a place where the leaking may not matter. The plastic for the standard BRS Standard reactor is too cheap for the hanging mount. Not sure I would trust it to actually hang for very long. I have it sitting down level outside the sump. The plastic canisters seem like a very good quality. Here is where I much prefer this reactor to the other reactors like TLF and aquavia. There is a canister within the canister. Water flows down outside the internal cartridge and back up. Unlike the others I've used that have a straw/tube going down the middle. It just seems like I get a perfect nice slow tumble of the GFO. I got the reactor with the Cobalt MJ1200 and it's a perfect match that is silent. GFO: I opted for the standard GFO and used one cup. I have about 280 operating gallons. So I think that's pretty good reducing PO4 that much in 24 hours. Their more expensive GFO must really be something if the standard works this well. Carbon: If you havn't already watch their video on the ROX 0.8 Carbon I would recommend giving it a looki. BRS Bulk Premium ROX 0.8 Aquarium Carbon - Bulk Reef Supply 24 hours and water really cleared up. I used one cup.