Forum Discussion

lovemy5thwheel's avatar
Jun 12, 2017

Black water tank additives QUESTION

Question: If probiotics are good in the holding tank and some of the RV stuff has them in them, can we just add our over the counter probiotics that we take to our holding tank? If so how much would you add. I was thinking of Dawn, Water Softner and Probiotics. I would think that it would be healthier and cheaper than buying black tank additives
  • dewey02 wrote:
    A holding tank is NOT a waste treatment plant and it isn't a septic tank. So comparisons to those systems is not even relevant. A holding tank is just that - a holding tank. If you've got no smell problems, just continue using a lot of water with each flush. If you've got some smell problems, then there are many products you can use. It isn't rocket science and it isn't a big deal.

    And despite what is said above, commercial waste treatment plants often add chemicals to sewage to precipitate out the phosphorous (tertiary treatment) that is present in sewage and isn't removed through the aerobic biological process.


    Probiotics aren't going to precipitate out the phosphorous and even if it did that would only create the problem of having a layer of phosphorous on the bottom of your holding tank.
  • valhalla360 wrote:
    dewey02 wrote:
    A holding tank is NOT a waste treatment plant and it isn't a septic tank. So comparisons to those systems is not even relevant. A holding tank is just that - a holding tank. If you've got no smell problems, just continue using a lot of water with each flush. If you've got some smell problems, then there are many products you can use. It isn't rocket science and it isn't a big deal.

    And despite what is said above, commercial waste treatment plants often add chemicals to sewage to precipitate out the phosphorous (tertiary treatment) that is present in sewage and isn't removed through the aerobic biological process.


    Probiotics aren't going to precipitate out the phosphorous and even if it did that would only create the problem of having a layer of phosphorous on the bottom of your holding tank.


    Of course they won't, and as previously mentioned, comparison of holding tanks to sewage treatment facilities or septic systems is meaningless. And why would anyone want to remove phosphorous from their holding tank? As I said, this is a holding tank not a sewage treatment plant. The effluent in the holding tank gets treated AFTER you dump. You and I agree on almost everything in your original post with the exception of your comment about commercial sewage treatment facilities.

    And now back to the main topic of this thread.
  • I was thinking maybe the OP was looking to keep the tank clean in order to keep the sensors clear, our new to us 2010 shows the tank to be full so perhaps he's not wanting to be the water treatment plant but to keep his tank clear of buildup?

    I did read that either Dawn DWS or baking soda would work good to clean up the sensors along with a sprayer made to use in the black tank.

    My particular setup has a flushing port that I can use to flush at a full hookup after we drain but I did not se if it helped the sensor issue.
  • Nothing beats the wand down the toilet for cleaning the black tank.
    I have used them all and still use the black tank rinser most of the time but the wand comes into play at the end of the season or sooner if I think it needs it.
    Barney
  • I agree with what Barney says.

    I still carry the wand with me but usually say, ahhhhh thst is good enough after using the on board flusher.

    Nothing beats that wand.