So I built this manifold to make it easier to divert the water flow. I can route part or all of the flow through the heater. At this point I only have one of these solar heaters but today is bright and very sunny and I can feel an appreciable difference in the temperature of the water coming out of the return. Unfortunately one of the hoses it came with has a pinhole leak.If you can't tell from this photo I am not a fan of hoses to begin with. In any event I need to contact support for a replacement because that is not acceptable that it arrive with defective parts. Ultimately I could see picking up two more of these next season and extending the array of heaters, if this one shows measurable promise.We have a permanent 30 x15 above-ground pool. We bought 4 of these (probably need 2 more.) It seems to work. The problem is the 4ft hoses that are included are of poor quality. Almost everyone has leaked. They get a few pin holes and water squirts out every where and the holes get worse. Today we noticed the water level had dropped a few inches and sure enough, major leak from a hose that had split. We are a going to have to spend more money on better quality hoses. It's disappointing to lose all that water.Buy your hose from harbor freight. 24 foot roll 13 dollars . The heater comes with a 1 1/2 connector hose which is way to short. They give you a couple reducers to make their 11/2 hose hook up to 11/4 but it leaks. Hasn't warmed my pool yet it's a 12 foot by 30in deep. Hoping the 48 feet of hose will heat up too in the sun . When I got my package it had a hole in the box, their hose was cracked and looked like a returned item. Will let you know update when a couple hot days go by.Day 3 with 90+ sunny days. My 12 foot by 30 inch pool which is in the garage because thats the only level place, plus it keeps the kids from getting sunburn. The unit will work with the correct flow rate of water.My pump is 660 GPH which is way to fast for the water to heat up. I left the pump off for about 30 mins and the water did get warm but it only holds about 3 gallons. After the 3 gallons runs out I get cool water again. I'm going to try a small pump around 290 GPH to see if the slower flow rate helps.I think you will need 2 or 3 units hooked together to get constant warm water. I will try the small pump first and report back.Additional hoses were needed to install this itemThey need to give longer installation hoses! I had to go to local hardware and buy hosing and hose clamps because I literally couldn’t get the hose this came with to reach my pool filter properly. That’s my only complaint. Other than that, we love it and have 2 of them since our pool is so big!Last year on the cooler summer days we barely maintained our pool at 75 degrees. This year with a little help from our solar heater our pool RARELY saw below 80 degrees. We even hit a 90 degree day. It has been in the mid to high 70’s for a week straight and our pool temp is at 86 degrees. Perfect!!!!! Great buy!!!!Hose connections are awful. The hose supplied is to big for hard plastic connections so they supply cheap hose clamps and rubber bushings which even with good clamps super tight the hose will still slide off. Usually when you’re not around so the pool drains down a couple inches before you notice which in a 30’ pool is a lot of water. The covers are also a poor design and will just blow off. Only good thing is with 2 of them we can tell a difference in water temp, but the work to install them and mess with them to not leak is a pain!The cons first. With my pool, this solar heater hose was a little short so I had to buy a cinder block to prop it up on so it wasn’t hanging. Not really a big deal just something to note. Also, the first time I hooked it all up fairly easily but there was leaks around the connections so I had to take it apart and reconnect it with the tape. Then it was good to go. My advice is to use the tape from the start. I will add, it not the most attractive thing, but honestly, neither are above ground pools in my opinion.The pros... IT WORKS! We live in NE Ohio so I was certain that we would not be able to get away with just one heater but I wanted to try with just one and I’ve been surprised at the temperature we’ve been able to maintain. Not bath water but certainly feels up to par with most inground pools with regular heaters. For such a great price you really can’t go wrong. I would certainly recommend this item to anyone who wants to take the chill off their above ground pool.En 2 journées ensoleillées autour de 28C, ma piscine de 15pieds a passée de 79F à 87F avec un seul chauffe-eau. Normalement, j'aurais atteint 83 ou 85F, donc 2 à 4 degré F de plus. Bien sûr, j'ouvrais les valves vers le chauffe-eau seulement lorsque le soleil était sur le chauffe-eau.Par contre, veuillez prévoir l'achat de tuyaux flexibles avec un diamètre intérieur de1po1/4, car les tuyaux d'origines sont bas de gamme et les caoutchouc qui servent d'adapteurs sont trop petit (1po3/8 et les tuyaux ont 1po1/2), donc les tuyaux d'origines ne font que glisser sur les adapteurs malgré un serrage adéquat et une pression de 12psiWorked great this summer . Weather was really hot so it warmed up my daughter's 10ft×30inch pool nicely o hot days.It’s greatTres difficile de dire si ce produit est réellement efficace, moi je ne vois pas de réelle difference. La qualité est bonne par contre.Produit prévu pour chauffer une petite piscine jusqu'à 10m carré, la piscine de mon fils ne fait que 6m carré, même en plein soleil ce chauffage solaire n'est pas en mesure de réchauffer l'eau car son circuit interne est trop court. Au pire ce serait efficace en branchant 5 produits de ce type... impensable vu son prix exorbitant pour un machin entièrement fabriqué en Chine qui ne coûte presque rien en fabrication... passez votre chemin