Jun 4, 2016 - However, the water is now nice and clear but the grout looks black in . I was able to get rid of the black-green grout and the pool grout now back to normal colour. . Measure the pH (tester kits are dirt cheap; lab pH papers good too, find that chlorine at 1.5ppm isn't enough to stop green algae appearing. May 8, 2017 - I'm having issues with minor bright green algae growth below the water line on the grout. . How To Clean Algae From Swimming Pool Tile Grout - . Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool . Use Flocculant to Help Remove Pool Algae. If you have a multi-port valve on your filter, shut off your pump and turn the valve to Recirculate or Recycle. Add the recommended dosage of liquid or powder flocculant to your pool. Circulate your water for two hours, then shut off your pump and let it sit overnight. Jul 1, 2015 - If your have this problem, here is How To Get Rid Of Algae In Pool. . They can stretch to plaster or grout and must be removed or they will come back. . With this inexpensive chemical, you can have your swimming pool clear . It is a very old pool which needs to be redone, but budget prohibits a . Would like to clean up whatever this is, re-grout and reapply the tiles If this doesn't bother you, it does a great job and is by far the most economical (approx gallon. . then use a chlorine tablet and rub over black algae; it can also be broken-up to . Mar 16, 2018 - Hard-to-remove pool spots and stains can take a bit more than just brushing. . Algae, worms or other animals can also leave an ugly stain on your pool . It also comes with a tile grout scrubber to get in between those fine cracks. . Stain Free does work well yes, we also have a cheaper private label . Nov 7, 2010 - The only way to clean the grout is by using the brush side ways . All values are ok and have been for years (Ph Chlorine and anti algae). Algae are always present in swimming pools, even clean and blue pools, at a . Their roots extend into the pool plaster or tile grout, and unless the roots are destroyed, It is cheaper and easier to pay a little up front for more chemicals, more .