This is another one of Steve’s easy RV modification posts:
I installed this kit several years ago and have had plenty of time to observe how it works for us. We dump our black tank at different time intervals – anytime between 3 to 10 days of use, depending on our travel dates. What I like about this kit is that the chemical is dispensed per-flush, so it makes no difference when we dump. We don’t like to drive with the odor and extra weight of black tank contents, so we dump every time we depart a campground, if possible.
We’ve been happy with this system and recommend that folks traveling in a situation similar to ours take a look at it. Be aware that the chemical refills can be somewhat difficult to find, and we’ve only had luck locating them online – meaning we must have them shipped to us. It’s not too onerous, as each container lasts between 1 – 1.5 months with normal use, so we normally order refills 3-4 times per year. The best price we’ve found for the kit and the refills was at rvupgradestore, and we’ve always received the refills from them in a timely manner.
I haven’t tried to price-compare the Blue Streak chemical vs. “toss-in” products, but we like the convenience of this kit so much that we won’t consider going back. It keeps the odor down just fine, and we like the blue water that remains in our toilet after each flush.
The installation on our toilet was very easy, but I won’t detail it here as yours may differ. I will point out that the kit is pretty much foolproof, since the chemical moves from the tank to the toilet’s water inlet line via gravity and there isn’t much that can go wrong with it. The container has a level indicator that shows how much remains in it.
We hope to hear from folks who decide to install this system, or are already using it.
Lowes Travels 
I don’t seem to have much luck with the drop-ins. Here on the East Coast where the weather is both hot and humid, it seems I smell the tank more than if the weather is cooler. I’ll have to look into this to see if it would work with my toilet. Sincerely glad for this input. Thanks!
Nanny
Please let me know how it works out for you if you install it. We’ve had no odor problems, but I can’t compare to before the kit because I installed it soon after we purchased our coach. I’d like to hear how it works on other RV’s. Thanks!
~Steve
We will definitely look into it. Thanks for the recommendation Steve. We’ve been using Happy Camper but that isn’t automatic.
We have never heard of this system but will have to look into it. We try to dump every time we move but it would still be nice to have something like this.
We don’t normally have “odor” issues … except in the summer when the temps go up and the humidity increases. I’m going to mention this to Mui … although first we need to figure out why the toilet is not holding water in the basin despite replacing the seal.