I have organic stains on the walls and seams everywhere. The wife and I have been slowly cleaning it with Vitamin C tabs. This is very time consuming and I doubt we will ever be able to get it all clean. There are stains on the floor where earthworms sat and decomposed over the winter. I figured that most of this would fade after some sun, bleach and regular brushing but it seems that vitamin C is the only cure. Is there something else I can use to remove these stains? Something a little quicker and doesn't require me staying under water for extended periods of time? Here are my numbers:
We went out of town a few weeks ago and I added 8 gallons of bleach which brought my FC levels up to 16-18 and covered with solar. I thought that might help the staining but it didn't. Any suggestions? Also, is it ok to use a magnetic stirrer for the FAS-DPD chlorine test?