I personally use Happy Campers and it seems to work fine. I think the most important thing is just using enough water. No treatment will replace the need for plenty of water in your tank. But, I’ve had no smell or clogging issues using Happy Campers.
I’ve heard good things about Happy Campers. It just seems expensive to me compared to some of the other treatments. BUt if it works well maybe its worth it.
It’s funny you should ask, I just picked up another tub of Camco TST today. Its been my go-to for years. Mainly because its just as effective as any of the others I’ve tried and at a fraction of the price. It’s alos easier to use than scooping powder or measuring liquid.
The dealer I bought my RV from recommended Tanktechs rx. The bacteria in it kills bad smells, doesnt just mask them like others. I’ve gone a week in high heat without emptying my tanks and no foul odors whatsoever.
The one downside guess is you have to remember to NOT empty your tanks completely. The directions say to leave an inch of liquid to maintain the bacteria that has built up in the tank. It might be difficult for some to know how much is left in your tank.