algae has us stumped in Hawaii

[jandelliott]

My 35,000 gallon in-ground pool has been perfect for years, and
now it has algae and we can't get it under control!! It's been 3 weeks!!
Chlorine is 3
PH is 7.8
TA is 120

We have super-chlorinated many times, run the pump all night,
cleaned the filter (cannister type) over and over and over. Finally drained some water
and refilled. Still no help!! Any ideas? This pool was perfect for YEARS and nothing changed. I live in a remote area and we have to maitain our own poolls out here. No pool service.
Thanks fro M Hawaii

 

[Titanium]

jandelliott,

Others will probably be along soon who know more about pool chemistry than I do, but this should get you started.

http://www.troublefreepool.com/viewtopic.php?t=52

Also, a very important number for us to know is your CYA (stands for Cyanuric Acid) level. We would prefer that your numbers come from a good drop-based testing kit such as the Taylor K-2006 test kit http://www.taylortechnologies.com/produ ... KitID=2230 or the TF test kit http://www.tftestkits.com/ but a reading from a pool store would be better than nothing. Readings from test strips are basically untrustworthy.

What have you used for the last several years to chemically treat your pool?

Titanium

 

[duraleigh]

First, welcome to the forum. You'll get lot's of good advice.

Secondly, regardles of how complex the advice gets, the answer for your green pool is chlorine. You have either been not using enough or replenishing it as frequently as you should (or both) so the algae continues to live.....chlorine, applied correctly, will kill it and keep it from reoccuring.

How much chlorine to put in your pool will be dependant upon your CYA level. Do you have the ability to test for that? If so, post up that result and we'll get a plan together to get your pool clear

 

[Hotrod30]

Also... what type of chlorine are you using to shock? Liquid.... powder.... Brand?