Recent content by DS

Thanks. Keeping the polyquat. Returning the phosphate remover...

I thought algaecide was recommended during AA treatment.

Ok. Thanks. Good point about the cost. That raised my curiosity so I tested and found that ortho-phosphate is only about 1200 ppb. It wouldn't cost much to eradicate phosphate at that level. However, would I just be throwing money away anyway? I've been extremely diligent about following methods...

Hello, Would it be good insurance to use a phosphate remover in addition to poly 60 before doing an ascorbic acid treatment to prevent algae while no chlorine is present during AA treatment? I regularly use HEDP sequestrant so guessing phosphates are relatively high. If a good idea, is there...

Ok. Thanks Mark. Also, the comparison spreadsheet (which is a great tool BTW) results show the SuperFlo efficiency is better than the MaxFlo using my config. However, I viewed a few of your threads here that stated the opposite. Do you still think the MaxFlo is more efficient than the SuperFlo...

Thanks. Can I use my Jandy RS4 to turn on/off the SuperFlo and MaxFlo, then program a series of different RPM sequences at the pump? If so, that doesn't seem too limiting for my purpose. Maybe I'm not considering the other things a VS can do. I've only had a SS for the last 10 years. Is the...

Hello, My 3/4 HP Hayward Northstar circulation pump motor is dead. I've decided on VS to replace instead of dual speed since my marginal electric rate is $.32+ kWh most months. I've spent a good deal of time using mas985 spreadsheets to evaluate pumps and narrowed to three above in addition to...

Hello, My 3/4 HP Hayward Northstar circulation pump motor has gone kaput. I've researched variable speed, single speed, and 2 speed replacement options but have only succeeded in becoming confused. Have no real preference for either type. Looking for overall most cost effective solution. Hoping...

So life happens and resulted in this project being temporarily shelved... Here's what happened since the last post post: I shut off the return flow to the spa until it actually stopped draining. Apparently, I did not cut the flow long enough before because this time the spa kept draining below...

I thought about the pool level test last night so I marked on the tile where the pool level is when the spa is full. This morning the pool level did not change but the spa drained. To confirm how much the pool should raise if the spa was draining into it I did the following: After the spa was...

Well, another disappointing outcome following that experiment. Removed pump basket lid, removed SWCG cell, both 3-way valves closed to spa. No flow into the pump basket and no flow from SWCG port, but the spa still drains. Looks like I have an underground plumbing leak. No visible signs of...

Thanks so much for help with troubleshooting. This problem seems impossible. After replacements, I closed both 3-way valves to the spa (fully blocking flow from/to the spa). This was done manually by removing the actuators and operating the valves manually. I left them in this position and...

Here are pics. I can post more if these don't help.