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Jim, I assume you meant MPV (multiport valve), not MVP. Any way, my system does not have such a valve. It has a two position backwash valve with a T-handle that you push-pull and turn. There's another valve which allows me to use just the skimmers, just the main drain, or both. But I don't...

For the last several days (and probably longer) I've noticed the water flow into my pool has dropped noticeably: very little surface disturbance near sidewall nozzles, less pressure from the floor jets. The pressure gauge on the filter tank shows its normal 28-30 psi. I've cleaned the two...

I had meant to include the age of the pump/motor but forgot--it's 12 years old. I live in Massachusetts so we don't have a long pool season here. The pump never runs more than 4 months in a year, 10 hours a day. Your suggestion is probably the right thing to do. Don't try to find just...

I have a 1.5 HP Pentair Whisper Flo inground pool pump (0 177451 - 03). I hear a scratchy/screechy noise coming from the pump/motor assembly. The noise has come and gone for a few years now. I'd like to avoid a catastrophic failure in the height of pool season. I plan to replace the seal or...

I have a Taylor K2005 test kit, which does not contain a FAS-DPD test. None of my local pool places stock a FAS-DPD only test kit (Taylor T-1515-A). I couldn't see buying a K2006 or TFT-100 test kit since it would duplicate so many of the tests I already have. I realized that if I just bought...

SLAM Update & Where Do I Go From Here?? I've rigorously followed the SLAM instructions and have been SLAMMING away for four days. I've maintained the free chlorine level in the upper teens based on a CYA level of 40 ppm. Combined chlorine has fallen from 1.5 ppm to about 0.25 ppm. Overnight...

Thanks, I see PetSmart sells them for $10. If I determine the ammonia level will that help me purchase the correct amount of chlorine I will need?

Is there a test to confirm the presence of ammonia? Is there some substance I can add that gets rid of ammonia?

Pool details (I can’t edit my signature for some reason and the data in the signature area is incorrect): 22.5 k gallon free form plaster/pebble pool, 1.5 HP Pentair WhisperFlo single speed pump, Pentair FNS DE filter, Aquacal Aerotemp 155 heat pump, 3” tabs or bleach used depending on CYA...

Just before closing our pool last fall I had the cyanuric acid level tested at a pool supply place--they said it was 77 ppm. We just opened the pool and I had the water tested at the same pool place. They say the CYA level is now at zero ppm. I had them test it again one day later and they...

OK, so I own a K-2006 test kit. I remember doing the CYA test a number of years ago and thought it was pretty hokey. I thought the "disappearing dot" aspect was too subjective. Plus, the numbers for CYA are very difficult to read; clear plastic numbers on a clear plastic background, on an...

Eight year old 22,500 gallon pebble finish gunite pool in Massachusetts with DE filter and heat pump. On 6/12/2016 the stabilizer level was 51 ppm. On 8/15/2016 it was 70 ppm. And on 8/29/2016 it measured 84 ppm. The first and last tests were performed by the same pool place; the middle...

Today I opened our inground pool. As soon as I powered up the circulator pump copious amounts of water flowed out from the Aquacal Model 155 heat pump. I removed a number of panels from the unit and discovered there was a vertical crack (maybe 1/20th of an inch wide and 2 inches long) in the...

Back in Business!! I installed the new contactor and the heat pump seems to work fine. As you suggested I cranked pretty good on the high current terminals. Thanks for your help.

More Info OK, so I tore into the heat pump this afternoon. On the printed circuit board there is a contactor that controls the compressor. One of the compressor motor wires (red) was badly burned and separated from the screw terminal on the contactor. I was thinking of cutting the burned...

We have an AeroTemp model 155 heat pump for our swimming pool. It's about 5 years old and doesn't get used all that much. The other day I noticed the heat pump wasn't running at all. I reset the circuit breakers which had tripped. Now the heat pump powers up (panel lights up, fan runs) but does...

Additional Information OK, so I checked my log for acid usage per your suggestion. You should know that instead of adding small amounts of acid or baking soda every day I tend to add larger amounts every several days. So my data is somewhat “lumpy”. I split the 27 days into three 9 day...

As for my chlorine consumption I know it does seem low. A few years ago I was using the 3” trichlor tabs and kept track of my usage then as well. It worked out to be quite close to the 1 ppm I currently am using with bleach. So for whatever reason this pool just doesn’t need that much...

More Information Not a lot of covered pools here in New England--this one is open to the elements. I have tried to keep the pH in the 7.2 - 7.6 range. But it quickly rises to the high end of that range and then keeps on going up. It doesn't seem to "settle" anywhere. I will try not...

Background information: 22,500 gallon gunnite/plaster pool with pebble finish, 5 years old, DE filter, Whisper Flow pump, Nature2 Pro G mineral sanitizer, in-floor cleaning system, no water features, light bather load, sunshine on pool from 9 AM to sunset, located in northeastern Massachusetts...

We have a five year old in-ground pool with a stamped concrete pool deck. The pool builder applied a sealant to the deck that looks to be completely gone. I'm wondering if I need to re-seal. Would not re-sealing it significantly shorten the life of the deck? I know the sealant provides a...

topher Why do you add salt to your pool if you're using liquid chlorine? If you don't have a salt water generator what is the reason for adding salt? duraleigh Two reasons for switching to liquid chlorine. First, I'm getting tired of constantly adding TA up and pH down as a result of...

I’m considering switching from the trichlor hockey pucks to liquid chlorine. I wanted to get a feel for how much bleach or pool store liquid chlorine I’d need. So I did a chlorine usage calculation for the trichlor pucks. I purchased the pucks on Aug. 5, 2010. I assumed I started using those...

OK, this is very helpful. I was always a little suspicious of the “don’t use bleach ‘cause it’s full of dissolved solids” line from the pool supply places. They made it sound like these solids were impurities, not fundamental components of the actual chemicals themselves. This was back in the...

Thanks to all those who responded. To answer MNPoolDreamer's question, I have not added any make-up water this season--Mother Nature has been doing that for me! I read the BBB approach to pool maintenance. Many years ago we had another pool, an inground vinyl lined pool. We used pucks and...

Background: 22,500 gallon fresh water inground gunite pool with pebble/plaster finish, Pentair WhisperFlo pump with 1.5 HP motor, Pentair vertical grid FNSP60 D. E. filter, Nature2 G sanitizer, Pentair 320 inline chlorine feeder, and AquaCal AeroTemp heat pump all located 30 miles north of...