What do you recommend for black tank treatments in this heat? July 12, 2024 at 3:52 pm #41283 IA_CamperParticipant Joined: Jan 2024 Posts: 121 Likes: 128LikeUp0::I use Camco TST, mainly because they have it at my local Walmart and its cheap and works. But agree with the above, use more water than you usually do and add in whatever treatment you like and you shouldnt have an issue.