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Thread: Can Low Borate Levels Help Algae to Grow.

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    Can Low Borate Levels Help Algae to Grow.

    I think I read this somewhere. If say the level is only 8 ppm is this an issue and if so why?

    Thank you.
    10,000 gal plaster pool,3/4 hp WhisperFlo pump, Sta-Rite Great White GW9500 pool cleaner, Hayward 300 lb Sand Filter
    Use Magenta Stuff for Iron and Silica control.
    Balance: pH 7.7 Cl 7 -8 Alk 70-80 CH 325 CyA 30 in winter - 50 in summer NaCl 1010 TDS 1200

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    Mod Squad jblizzle's Avatar
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    Re: Can Low Borate Levels Help Algae to Grow.

    If so, then I am doomed because I have 0ppm of borates

    Or are you suggesting that 0ppm is fine and 30-50ppm is fine, but somewhere in the middle would help algae? I do not see how that would make any sense.
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    Re: Can Low Borate Levels Help Algae to Grow.

    Obviously 0ppm is fine and 30-50ppm is fine, but I believe I read low levels can help algae to grow presumably low is say 5 -15. or 20.
    10,000 gal plaster pool,3/4 hp WhisperFlo pump, Sta-Rite Great White GW9500 pool cleaner, Hayward 300 lb Sand Filter
    Use Magenta Stuff for Iron and Silica control.
    Balance: pH 7.7 Cl 7 -8 Alk 70-80 CH 325 CyA 30 in winter - 50 in summer NaCl 1010 TDS 1200

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    Re: Can Low Borate Levels Help Algae to Grow.

    Boron is an essential micronutrient for plants including algae, but the amount needed varies by species. As noted in this link, green algae had no effect between 10-24 ppm. Table 18 shows toxicity levels for algae which results in growth inhibition for of 50% at levels of 34-52 ppm and approaches 90-100% inhibition at around 100 ppm.

    Nevertheless, I would not say that low levels of boron in a pool accelerate algae growth unless you compare such growth against algae in water with no boron at all. Phosphate levels are usually the limiting micronutrient in most pools. Of course in your pool with extremely high phosphate levels, algae growth would be limited only by sunlight and temperature were it not for chlorine properly managed relative to the CYA level.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    Re: Can Low Borate Levels Help Algae to Grow.

    chem geek,

    Thank you for the reply. It seems therefore that if, and only if, the Chlorine and CyA levels are properly maintained there are no issues.
    10,000 gal plaster pool,3/4 hp WhisperFlo pump, Sta-Rite Great White GW9500 pool cleaner, Hayward 300 lb Sand Filter
    Use Magenta Stuff for Iron and Silica control.
    Balance: pH 7.7 Cl 7 -8 Alk 70-80 CH 325 CyA 30 in winter - 50 in summer NaCl 1010 TDS 1200

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