Bridget and I have No problem with our head on our R-29. We use it a lot with no issue. It does not fill up fast and we do use sea water.
It is important to add chemical to the tank. It is also good to pump out at a pump out station every so often and give a good flush with fresh water. We mostly pump overboard where it is legal.
When we do our flush outs at a pump out station I fill the tank three times with fresh water and then pump it out.
It is also good to flush with vinegar every few months. How we do that is, if you are in the water then you need to close your sea cock. Then open your sea strainer and have someone flush the toilet while you are keeping the sea strainer full of vinegar. Flush the whole gallon through. What this does is clean the lines. It will also clean your tank. If you are able to pump overboard then it will clean your macerator pump and lines also. It is ok to leave it in your tank till you can pump over.
Remember to reopen your sea cock when you are done.
Some people also complain that there is a smell outside there boat when they flush there head. The way to keep this from happening is, Keep chemical in the tank and we also have installed a vent filter. It is full of charcoal and will eliminate the odor coming out the vent. We use one called Big Orange. I like that one because you can replace the charcoal yourself once a year. Others you need to buy a whole new filter at around a $100.00.
I get replacement charcoal from the fish supply section at walmart. It is the same charcoal they use for the aquarium filters.
Here is a link on big orange.....
http://www.bigorangefilter.com/
There has been much talk about head odor on tugnuts over the last few months and the solution is simple and cheep.
Like everything else on our boats, It just requires maintenance. It is not that hard if one keeps up with it.
Chemical,Vent filter,and vinegar every so often
😉 Awww like a breath of spring!