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Thread: Algae problems

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    Algae problems

    Hi all,

    I've been trying to help my dad out with his pool....his water was constantly cloudy...so I had him shock several weeks ago until we passed all the steps. Talked to him last night and he said water is cloudy again and small areas of algae forming on the walls. I looked at the records he has been keeping...his chlorine was normally between 3-6....I did see a couple of times where it dropped into that 1.5-2 range. PH is usually in the 7.2-7.3 range. CH was 350. CYA was 30-35. TA was 120. He uses trichlor in his skimmer....and throws in about 7-8 pounds of Cal-hypo every couple of weeks. He also throws in some algae inhibitor( some Bioguard product) every week. His pool is about 35,000 gallons plaster surface, sand filter, 4 returns. I t seems like he is always getting the patches of algae on the walls and cloudy water. I've tried to steer him to TFP but he's kind of stubborn. I told him to keep his FC above 5 for awhile. The circulation in his pool seems to be rather low. Any thoughts or ideas?
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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    Richard320's Avatar
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    Re: Algae problems

    Low circulation could be a clogged filter. Which wouldn't be surprising if he keeps growing algae. You might also see about re-aiming the return jets to eliminate the dead spots where the algae grows.

    Otherwise it's just a waiting game. He'll see your clear pool and his swamp and decide to try your way.

    And I feel weird even suggesting this, but if he's a pool-store-strategy kind of guy with the weekly shock treatment, maybe phosphate remover would be a good idea for him. If he won't keep the FC up high enough to kill the algae, maybe you can starve it out.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Mod Squad Bama Rambler's Avatar
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    Re: Algae problems

    I hate to contridict Richard but I don't believe adding phosphate remover is going to help his problem. If he ever starts that he'll spend a fortune in remover and still won't have taken control of his pool. I'd try real hard to convince him the correct way to maintain his pool. That's the best thing you can do for him.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Algae problems

    Does it seem odd to anyone else that his CYA is only 30-35 yet he's been using Trichlor for who knows how many years?

    Concho, does he remove water annually to offset the CYA buildup? Any idea how he came up with that 30-35 number? I wonder if maybe his CYA is super high and as a result, his chlorine just isn't as effective. According to pool school, too much Cal Hypo can increase calcium which can cause cloudiness as well.

    Maybe show him this: pool-school/types_chlorine_pool
    18' round above ground, vinyl liner, 48" deep (flat), Confer Step1 steps. Approximately 7600 gallons. Waterways/Proline FC075 cartridge filter. 75GPM (71 minute complete cycle), 75 sq ft filtration area.

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    frogabog's Avatar
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    Re: Algae problems

    Dads can be the most difficult of difficult to impress things like TFP on sometimes... There's no good answer to convincing a parent of much of anything, just like kids... probably do the opposite for a long time till they decide to give in and allow their kid might know a better way.

    Sigh... Oh, and it's very likely that falling below minimum is what set him back and allowed algae to re-grow.
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

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    Join Date
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    Re: Algae problems

    I can't get my dad to fix his pool. He says some algae on the steps is normal. As long as the water is clear...
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Vette's Avatar
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    Re: Algae problems

    If he won't change, Phosphate remover is the way to go. It's either that or he'll end up using algaecides, and probably copper based ones at that.
    11,700 gallon 21' round 54" deep all-resin AGP - June 2012
    Waterway 1HP 2-speed pump / 100 sq ft cartridge filter
    Hayward 150,000btu Natural Gas heater
    I use and recommend the TF-100 for testing

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    frogabog's Avatar
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    Re: Algae problems

    You can always try the Grandpa quick fix route...

    "My children will not be swimming in your pool until it's clean and safe Dad. Sorry, but that's my rule."
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

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    Vette's Avatar
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    Re: Algae problems

    Print out some of the essential parts of Pool School such as ABCs of Pool Chemistry. Paste into Word and do some editing to make it shorter and leave a copy somewhere noticeable in his house. The reason you want to make it shorter is he may ignore it if he sees a big wall of text. I'd only give him the part about chlorine.
    11,700 gallon 21' round 54" deep all-resin AGP - June 2012
    Waterway 1HP 2-speed pump / 100 sq ft cartridge filter
    Hayward 150,000btu Natural Gas heater
    I use and recommend the TF-100 for testing

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    Re: Algae problems

    I bought him his own test kit....which he is actually trying to use....so he is giving it a little effort....I thought the same thing about the CYA several weeks ago, but I tested it myself several times and it was in the 20-30 range....he said he tested it last night and got around 60....I tested to about 30 yesterday morning.....I'm gonna test it again today....I suppose if it's closer to 60 and he's keeping his FC at 3-6...that could be part of the problem. Not sure when he's gonna give up on the algae preventative...you'd think he'd figure out that it's not doing what he thinks it does.
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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