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While researching my local health department rules on FC/CYA ratios, I happened to run into this Richard Falk (aka chem_geek) paper on the net, which I point out so that others may read it: - The Chlorine
/
Cyanuric
 Acid 
Relationship and
 Implications
 for
 Nitrogen
 Trichloride, by, 
Richard
...

Do you know how to troubleshoot low pressure at the 9-port water valves of a Paramount self-cleaning popup system? The 15 popups used to work just fine, in that a handful of Paramount popups popped up, rotated about 1/16 of a circle, shot water for a few minutes, and then popped down, awaiting...

Any ideas on how to make an airtight connection of two 50-foot long 1.5" diameter pool vacuum hoses for siphoning a green pool? This isn't working (it's leaking & therefore not siphoning):

I have three, somewhat related, questions which, without experience, dumfound me how they can be, in my pool: The first question is: Q1: What could make a booster pump, which appears to be otherwise working, have extremely low pressure (8 psi) measured at the water valve on the deck...

Once a week or two, I can 'fix" bad water chemistry - but - I want to be more proactive daily. Debugging a light algae coating, I just had my water read at Leslies: FAC = 5 ppm (Leslies says this is high and should be 1 to 4 ppm so they want me to add 19 ounces by weight of Leslie's Chlorine...

Hi Richard, Looking for a cheap bulk source of Lanthanum Chloride salt crystals, do you have any idea what the gram dosage of LaCl3 is from a typical does of PR-10000? Wikipedia confirms LaCl3 is used to precipitate phosphates from solutions: http://en.wikipedia.org/wiki/Lanthanum% ...

I've just finished replacing badly leaking pipes and it's time to start the pool back on an automatic filtering & cleaning cycle. I don't have the experience for the algorithm to set up a typical filtering & cleaning schedule. Almost arbitrarily, I have set the pool filter to turn on at 10am...

QUESTION: When using a repair union, does it matter (from a future leak perspective) which way the o-ring faces? DETAILS: I learned from this forum (specifically the BBB method) that the mineralizer on the output of my filter was probably useless. But I didn't remove it until this week, as I...

I came here to find what to use to paint the fixes to my pipes this week and the mods made this its own thread. Here are the related threads I read prior to posting: UV degradation of PVC piping, by DLSDO Painting PVC pipe, by j_blizzie Painting PVC pipes, by el_steak painted pvc pipe, by...

Where do you guys generally get your parts online for rebuilding your pumps and motors? With three Sta-Rite Max-e-Glas II {AO Smith QC1102 1.0x1.65SF 1.65 HP} pumps, one is always going out on me. I've been paying for others to rebuild the motors and replace the pump seals but I'd like to...

Getting ready to start up my pool ... ... I wish there was a better method of cleaning the filters: Do you know if these nice filter pleat brushes actually work: http://www.amazon.com/Hayward-EC2024-Cl ... B003MBXKOC http://www.intheswim.com/shopping/produ ... &pcode=208 etc. Have...

I only found out today about the existence and efficiency advantage of long-radius elbows versus short-radius elbows. Taking a look at my professionally installed pool equipment, I see only short radius elbows: Since there was plenty of room then, and now, I wonder why a builder would opt for...

Does the order of the tape & pipe sealant matter? Starting with this: Just wondering, if, for 2" PVC schedule 40 pool equipment, when using *both* pipe sealant & teflon tape: Does it matter if we put the teflon tape first: And then the pipe sealant? Before screwing the fitting into...

Do they make a good pool and spa thermometer that will last years in the sun and chlorine? I've bought about ten pool thermometers over the past few years, all from Leslies and Home Depot, and they all become unusable within a year or two: Can we buy or make our own more durable thermometer...

Do you sand down the skimmer basket or the lip on the pool deck to fit the baskets back in? Both my baskets are tight in the skimmer, too tight actually, so I'm going to have to sand them down. The only question is whether to sand down the pool deck or the basket itself. When this happens to...

NOTE: All standard disclaimers about muriatic acid safety precautions apply - they are assumed here - so they are not explicitly described in this post, which is more about curious experimental results than about anything else. Being relatively new to pool equipment maintenance, I wasn't sure...

I've had pretty bad luck with the "standard" nets from the local box & pool supply stores: The plastic ones crack: I'd replace the nets when they tear, if I could: But, even the aluminum ones with replaceable nets fail due to the plastic edges falling apart: So, my question: Q: Where...

Over the years, I've bought & broken and finally given up on aluminum pool poles from the box & pool stores: They bend: They crack: They kink: They break: My wife angrily threw away my prized yellow fiberglass pole after getting splinters, so I am trying to build a sliding steel pole...

There is no doubt my filter & cleaner pool pumps are both leaking copiously at the inlet as shown below (mostly when the pumps are off): They've been leaking from this very same spot for years: The problem is that the plumbing is pressed fitting to fitting, with 7 Jandy valves all pressed...

I need to repair what the manufacturer calls 'dimple leaks' in my solar heating panels for my pool - but I can't find the right plugs on the secondary market. The manufacturer recommends using four plugs per leak . The rubber plugs from the manufacturer cost about $55 per 100 count (which will...

I 'thought' I understood the chemistry 101 here but I'm having to put HCL in my pool about once a week lately to keep it at a pH of about 7.5. What is weird is that the Leslie's pool reports come back 'clean' except for the need for acid. What I don't get is if the buffering is fine, why do I...

My Raypack RP2100 pool heater doesn't turn on. The error is Fireman Switch open. There's no part called a fireman switch in the exploded diagram. http://www.poolcenter.com/parts_heaters ... al_pg2.htm What's/Where's a fireman switch? There is definitely propane gas in the line (the BBQ...

This paper says the pH will make a greater difference in solubility: http://jspsi.poolhelp.com/ARTICLES/JSPS ... p09-16.pdf And, this MSDS gives the solubility of CYA as 2,000 mg/l@ 25ºC http://www.sciencelab.com/msds.php?msdsId=9923614 Wikipedia puts the solubility of CYA in water at 2,700...

I have a few questions about the design and purpose of some components of my pool. Would it be ok to ask here for opinions as to why certain 'things' exist? Here's a starter: I already have a huge pleated cloth filter - but - at the output end of the filter - is another 'thing'. What is the...

EDIT: Disjoint topics were merged by the admins into this single project ... so I apologize for the multiple questions in a single thread. I hope it's not too confusing for you. It's a single project - but the questions are unrelated. Q: What would you do to this pool once drained and before...

picture relocated due to captions Q: HOW do I remove these Paramount pop up heads? Does anyone have this type of pool who has experience removing these to clean them out inside? I tried to remove these three (see the picture) but they won't budge! picture relocated due to captions

New here ... and reading all I can about pools and how to test for pool chemistry. Unfortunately, the link in the OP of the thread BBB for Beginners for "Leslie's Chlorine FAS-DPD Service Test Kit" appears to be dead (the Taylor kit links work fine). The closest I could find by searching is...

I am not a chemist. But I don't like getting ripped off ... nor do I like doing stupid things ... plus I would like to learn more about pools and pool chemistry ... specifically ... I'd like to know what I just put in my pool two days ago! So I post this query seeking more information! Based...

Q: How do 'you' calculate the cost per effective chlorine between liquid versus powder? Apparently this is the calculation to get price per available chlorine: a) liquid chlorine: $cost/gallon x 1gallon/9.7pounds x 1/10.8% by wt available chlorine b) liquid bleach: $cost/gallon x...

This is my first post so please be gentle with me... My pool is green so I googled and found this wonderful thread, which tells me I have to hit hard with free chlorine (FC). After reading the first post of that thread a half-dozen times, I realize that the time the free chlorine lasts is...