Ron its not like I would not consider the water solution suggested at all? I just found it was not working for me when as said I get about 2/3 full and its been warm out(80-90)If I have bath vent open and flush its stinks? what can I say ? so I use tank de odour and it works for me. People here asked about tank chemicals.I gave my brand and opinion.When people say Black tanks don't give odour I simply disagree that's all there is to it
So you have tried just water...correct?
And therein lies your problem. As I mentioned previously, why don't you close the vent and turn off the fan before you flush? That's a lot cheaper than purchasing chemicals to mask the odor.
Yes, the OP did ask about chemicals. However it is only prudent among those of us with years of experience to provide a cheaper and easier alternate source.
Ok, I'm gotta here.
Ron