I just installed a Circupool RJ45 this year. How long does it take to get FC levels up from 0-4? I turned the chlorinator on for the first time yesterday. I put it at 15% since my pool is only 18,000 gallons and this one is for a larger pool. I left it running for 24 hrs and checked levels when I got home. FC was only at .5. I filed it olio to 50% and let it go for an hour or so and it was still only at .5. What could be the issue here? My test results are below.