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Hi, I am about to open my swimming pool, and I had a big doubt. Last year a new filter was installed, and the old Pentair multiport valve was replaced with a 3-way diverter valve (see picture below). In the old valve, the filter and the backwash positions were clearly indicated on the valve...

Hi all, I have just bought a Dolphin Premier robot at a garage sale ($200 with caddy). I did a basic test: the robots turns on, and both the impeller and the brushes spin properly. I hope someone knows the robot, and can help me with some questions. 1) Is there any way to know the manufacturing...

Hi all, I opened my pool three days ago, after four weeks of "soft-opening" when I ran the pump 2 hrs/day with the cover on. When I opened the pool, the water was not perfect, but it was in decent shape (at least it was blue, and not green :-) ) The problem is that I am getting a very weak...

Hi! My pool is still winterized, with the cover on and the pump disconnected. I'll be traveling in the next four weeks and I won't be able to open the pool until May 29th. My concern is that temperatures will increase soon (I am in NY), and algae will grow before I open the pool. My neighbor...

Hi all, I am trying to replace my 10+ year old 500W bulb with a more efficient LED light. The light is a Pentair Amerilite 120V (P/N 78456300). I tried to remove the glass lens, but it looks like it's stuck on the case. This light has not been serviced since 2013. I tried to put a flat...

Hi, While fixing my pool light, and decided to upgrade to a smart switch. Currently, I have is an old 2-gang outdoor metal box containing: - A GFCI receptacle - A Single-pole switch for the pool light The pool light gets power from the LOAD side of the GFCI (note that I omitted the ground...

Hi, I purchased a Dolphin Nautilus CC last year, and it worked great. I just re-opened the pool, and I am experiencing two problems: 1) When the robot walks forward, it does not stay flat on the pool floor. Instead, it walks at a 15-degree angle, so that the brush doesn't touch the floor. 2)...

Hi, I just opened my pool after the winter and sadly discovered that the water (under the cover) was dark green. FC was at zero and CYA was < 20. I SLAMed the pool using Cal-Hypo as I had a 50 lbs leftover from last year, and I need to increase the CH anyway. I also added Muriatic Acid to...

Hi all, I am renting a house with an inground swimming pool. The landlord inherited the pool from the previous owner of the house. The pool has a Pentair light, and I can see the junction box next to the light, ~10 inches above the ground. The light has never been on, and I suspect the bulb...

Hi guys, I recently moved into a house with a 20,000-gallon swimming pool. The landlord uses a pool service company and they come every week to check the chemicals and clean the pool (they are pretty expensive). I went through most of the pool school and I realized they are doing a terrible...

Hi all, I am based in East Hampton, NY and I just rented a house with a 16x32 inground pool. My landlord had a pool service company who did weekly maintenance to the pool (mainly brushing and checking chemicals). The pool service company is extremely expensive, so I decided to take care of the...