I read your article about cleaning RV holding tanks.  Some of the ideas you have are OK, but I have to totally disagree with your use of bleach - anytime.  Bleach may clean YOUR tank, but it will KILL all of the enzymes in whatever septic system you pour it into.  This is not my opinion - it's fact.  Being a retired chemist allows me to be accurate on this matter.  In addition, many of the RV parks I have visited indicate NO BLEACH USE in their laundry facilities.  There's a reason for that.  It kills the septic system.  ALL septic systems work on the bacteria/enzyme concept.  Without enzymes, the system will fail due to clogged fields.  This takes time to happen, but it WILL happen if bleach is used in the system.  When the RV park needs to replace the system (which is very expensive) they will pass the cost onto we users in the form of higher rates.  All this will happen because you are instructing novice people to use bleach in their holding tanks.  Also, bleach is a poison.  It can contaminate water supplies.  If that happens, RV parks will close down.  Again, all because you are telling people to use bleach.  

Please come into the 21st Century and start using bacteria based holding tank solution.  They don't hurt the tank, septic system or Mother Earth.  

If you are a humanitarian you will stop using bleach, or any other chemical in your RV.