Vinny, I'm concerned about a couple things - ammonia and the method of testing FC. Here's what I'd like to confirm:
- Ammonia: Ammonia eats-up FC and stabilizer really fast. I mean REALLY fast. So make sure you have granlular stabilizer available and lots of bleach, then perform the following:
1. Begin a SLAM and dose FC up to SLAM level (FC of 10). If your CYA test is showing as zero (perhaps already converted to ammonia), use a SLAM/Shock FC of 10. Do not add additional CYA at this point.
2. Retest FC at 10-minute intervals.
a. If FC loss is greater than 50%, add FC to bring back up to SLAM level and continue retesting FC @ 10-minute intervals.
b. IF FC loss is 50% or less, add FC to bring back up to SLAM level. Go to Step 3.
3. If CYA is below 30 ppm, add enough CYA to bring level up to 30 ppm.
4. Continue SLAM as directed in the SLAM article until the SLAM Criteria of Done are met. Test as directed in the SLAM article - no longer need to test FC at 10 minute increments at this point.
If you have no ammonia, this will go fast and you'll be doing the SLAM. If you have ammonia, then the 10-min drill might take a couple hours. Stick with it!
- The testing: I find your FC results a bit odd (i.e. .80) We usually get FC results in simply whole numbers based on the number of drops used. Also, since you have the K-2006 test kit, those instructions may have the 25ml sample size. So do this instead: Use a 10ml sample, multiply the drop count by .5 (basically cut in half). That's our standard method of testing. SO if you have 10 drops to turn the tube from pink to clear, then your FC would be 5.
Let me know if you have any questions.
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Oh, and BEFORE starting the SLAM, lower pH to 7.2-7.5! Almost forgot that one based on your last test results.