I suggest that you look outside your narrow-minded box and do more research of your own.
We've been doing all sorts of research here for years, from empirical testing by thousands of homeowners, to finding and de-bunking the pool chem industry's mis-use of research, to checking the LEGITIMATE scientific studies. Most people have come to rely on PoolDoc as the leader of an army of swimming pool "MythBusters". We also frown on personal attacks like "Narrow minded" which is usually used when we de-bunk the latest electro-magnet scam.
I've had a vinyl pool for years. We have used both Baquacil and chlorine. There may be tried and true ways of getting rid of algae without algecides, but leaving your chlorine above 15 ppm for a long number of days can also cause larger problems in the long run, stabilizer or not.
Like Ben, I say WHAT PROBLEMS? I do not understand why so-called "pool professionals" don't recognize that chlorine IS an algaecide--the best there is! Perhaps a perusal of this site will reveal hundreds and even THOUSANDS of people who followed pool store/pool maint. company advice, got algae, spent hundreds with no results or with relapses, came here, followed our simple, logical and EFFECTIVE methods and never had a problem again.
Using an algaecide is also a tried and true method of dealing with algae. Almost all regular maintainance programs have you use one.
So? They also insist that vinyl pool owners need to add massive amounts of calcium to their water, despite the fact that calcium's SOLE purpose is to prevent calcium leaching from the walls--which is not possible in a vinyl pool. My point? They are wrong about SO many things, that they are wrong about this one, too. Most algaecides other than Chlorine have horrible side effects--like foaming, ammonia and high copper levels. Only polyquat doesn't and that mostly works as a preventative.
I have dealt with more than one pool care specialist and swimming pool chemical company and have done a lot of research about pool problems on webssites other than this (believe it or not there are other ones out there just as reputable and as useful as you).
I find this hilarious. Pool chem companies have been engaging in a campaign for YEARS to disburse mis-information about pool care and their products. If you trust them, that's your business, but don't ask ME to! Why, oh WHY would a trust a company that sells 12# of "total alkaline raiser" for $30 when I can buy 12# of the same stuff at CostCo for $3.50? Why trust a company that adds copper to its tri-chlor tabs JUST so it can say "Double Acting"? Why trust a company that lowers its active chlorine from 68% to 48% in calcium hypochlorite just so the largest retailer in the world will stock it? How much do they charge per pound for Sodium Carbonate, the ingredient in pH Up and other pool chems company products? I see the same stuff in my supermarket called Arm&Hammer Washing Soda for $0.69/lb. I can go on and on about ALL the ways they try to separate us from our money.
Why would I trust their tame shills? Our methods WORK, and we have the evidence to back that up.
All other research and discussion that I have had with ppl care specialists for the last 10+ year agree that high PH can lead to algae blooms and once you get an algae bloom it is harder to bring the PH down. (I have had many algae problems in the past.) Lowering the PH to the normal range actually helps make it easier for the chlorine to work more efficiently, does less damage to your pool, and weakens the algae...to a degree...thus making it easier to kill off. If you don't believe me, maybe you should do more research.
Buried in this is a GRAIN of truth: High pH DOES make chlorine less effective and therefore the LOGICAL conclusion is that algae in high pH situations may be harder to kill. Lowering it will make the chlorine more effective and then the algae will be easier to kill. How hard is it to bring pH down? I've never heard of ANYONE having this problem unless they had other chem problems. Weakens the algae? I suppose if you dunk algae in low pH water it will kill it--and melt your vinyl liner too. But lowering pH to the low 7's makes the chlorine more effective at metabolizing EVERYTHING, including algae.
I also thought that the point of this forum was to share information, from person to person, about methods that have worked for us. I know that this algaecide, whatever the ingredients, have knocked down our algae bloom quicker than any other sanitizer or other product out there, have kept it down, and have allowed us to balance our pool more quickly and efficiently than in past years. Which is obviously better for the pool in the long run or there wouldn't be basic guidlines for your levels. If you don't believe in my methods, check out the information copied from a few other websites.
Our goal is to rid the pool of algae, and not give it a chance to return. We know of no algaecide that does this effectively without serious side effects. The guidelines you quote are the VERY guidelines published by the pool industry, which WE DO NOT TRUST BECAUSE WE HAVE HARD EVIDENCE THEY ARE WRONG!
Once algae has been allowed to bloom, it is quite tiresome to destroy. The common steps to get rid of an algae problem are:
Shock treat the pool. If you are using chlorine, aim for at least 10ppm free chlorine (10 times the recommended minimum level).
This statement is simply wrong. CYA levels determine the minimum, maximum and shock levels. 1ppm is the minimum and 10ppm is the shock level ONLY for 0 CYA.
Circulate the water round the clock if possible.
Brush the pool and vacuum.
OK, we recommend this--filter 24/7 and brush and vacuum to waste daily.
Add a commercial algaecide prepared for the algae you have (green, mustard or black) according to the instructions.
Absurd instruction. The ONLY valid algaecide is polyquat and that works best as a preventative. Now you want to KILL the algae, and nothing works better than chlorine. Remember: In high enough concentrations, chlorine will kill ANYTHING. In World War I, Chlorine Gas was the first poison gas used, and the Central forces used it first against the Allies. In the earliest AIDS prevention program, prior to needle exchanges, addicts were given film cannisters of bleach and told to run it through the needle before each use. I don't know why you keep denying bleach's power as algaecide.
Repeat brushing and vacuuming daily if possible. Add more chlorine if the level falls below 5ppm.
Again, a well documented IN-correct instruction. Add more chlorine if the level falls below the SHOCK level for your CYA concentration. Why arbitrarily pick 5ppm? It's illogical. CYA determines the correct level.
Clean or backwash your filter regularly.
Nobody here will disagree with THAT!
www.poolwizard.net
This references yet another low-level copper/silver erosion system. Just another version of the Nature 2 system. Why, if you aren't selling it, are you referring us to it????
Select a Problem Green Algae Chlorine Odor Cloudy Water Corrosion of Metal Parts Discolored Water Eye & Skin Irritation Foaming Scale Scum Too Much Availabile Chlorine
Problem: Green Algae
Symptom
• Slippery pool surface
• Slimy walls
• Dull green water
Possible Causes
• Low free available chlorine
• High pH
Solution
1. Adjust pH to 7.2-7.4 with HTH® pH MinusTM or HTH® pH Plus® at least onehour before shocking.
I like this! What is SO special about HTH pHMinus that makes it better than Dry Acid (which it is) or Muriatic Acid? pH Plus is Sodium Carbonate--you can buy it at the supermarket for $.69/lb--I just saw it at that price last week.Now we see CLEARLY that you do not understand that the pool chem companies have NO interest in giving us facts, but in selling us more and more stuff. HTH is one of the worst perps.
I've already established that we agree with you that lower pH makes chlorine more effective, but there's nothing in that which gives credence to higher pH boosting algae growth.
2. Shock treat your pool water with an HTH Shock product.
Uh-huh...And that is???? Cal-hypo...Which is notorious for turning water cloudy temporarily, for raising calcium levels, possibly too high. Bleach or liquid chlorine is FAR better for this as it has fewer side effects (none that I know of). Again, it's a pool chem web site info pushing THEIR products. I don't blame them--they are in the biz of selling, but it's not what one thinks of as UN-biased authority.
3. Brush walls vigorously using the brush designed for your pool type.
4. Run filter for 24 hours or until water clears.
5. Vacuum.
6. Add an HTH® Algaecide.
And that is???? If it ain't polyquat, it ain't going in MY pool! And if I have a bloom, it's too late.
Preventative Maintenance
• Maintain free available chlorine at 1.0-4.0 ppm
• Maintain pH in the 7.2-7.8 range
• Shock treat pool weekly
Again, 2 clearly incorrect recommendations. FC residual levels depend on CYA levels. For 0 CYA, FC of 1 to 3 is recommend, but for 10-20ppm of CYA, an FC of 2 to 5ppm is necessary, and for 30-50ppm of CYA, your FC must be in the 3-6ppm range.
Why shock your pool weekly? Only do that if you are NEGLECTING your pool. If you maintain the residual levels of FC for your CYA, shocking should only be on an as-needed basis, when you have CC or when your FC drops below the minimum level for your CYA. Or, of course, if you are growing something.
Pool myths perpetrated by a pool chem company.