Head Care
I recently purchased a C30 and had similiar questions about the frequency of head pump out and treatments. I found that I was pumping too much lakewater into the holding tank when I had the seacocks open. I asked around and many boaters keep the seacocks closed and simply pour about 8 oz of water in the head to flush to the holding tank. This reduces the amount of intake water filling up the tank. As for treatment, I purchased K.O as per Peggy Hall Head Master and have been satisfied with results. Keep in mind, depending on the size of your holding tank, a day with four people using the head and pumping too much water through the seacocks into the holding tank will certainly keep you going back to the pumpout stations. Good luck.