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Thread: Filter damage from Bacquacil pool with too much algae

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    Filter damage from Bacquacil pool with too much algae

    Hi. We got a brand new Hayward 1HP pump and filter last July. This year when we opened the pool it was a little green but clear to see to bottom. Pool is 21k gallons 16 X 32 rectangular inground with 3 ft and 8 ft ends. After 8 days of endless work and endless BAC products we gave up and started the conversion to chlorine using the bleach method. I have noticed that my filter since the beginning has been running at 20bpi and unless I vaccuum on waste and THEN backwash I can't ever get my pressure under 10. Once I finish backwashing and rinsing the pressure goes back up to 20 and I backwash it when it gets to 22. Do you think this is normal? Could the bacquacil have damaged the filter in any way? It is under warrantee until mid July 2011. Any thoughts on this subject are quite welcome. Conversion coming along nicely. Low end is clear and sparkly, algae is dying and am brushing away the brown dead stuff. No longer live green algae. Thanks!

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter damage from Bacquacil pool with too much algae

    Converting from BAQ and clearing algae will both cause your filter to clog very quickly. Are you following the Baq conversion process from Pool School?
    Are you maintaining your FC at 15ppm?
    What's the brand and model of your filter?
    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: Filter damage from Bacquacil pool with too much algae

    The filter was dragging before I started the conversion, now it is working much better. My pump is a hayward 1hp. My question was more about the bpi if that is considered normal for a brand new filter.

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter damage from Bacquacil pool with too much algae

    Not sure what units bpi are the common pressure units around here are psi (pounds per sq in) or "hg. (inches of Mercury).
    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: Filter damage from Bacquacil pool with too much algae

    psi sorry i'm senile sometimes. stays at 20 will drop down below 10 ONLY if i vaccumm on waste, then backwash

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter damage from Bacquacil pool with too much algae

    It's hard to say what's normal. I wouldn't get worried about it unless it stayed above 20 psi after a backwash. Even that's not unheard of as a starting number.
    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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