Hi Misskelsey: My name is Jerry Parker, the Ahh-Some manufacturer. Your picture is very typical as to what is released during a purge. The green gunk is normal as to what can be released from tubs. You are doing everything correctly. Keep using one half of a level teaspoon. You do not need to add any extra gel to do the job.
So it sounds like you have used a smorgasbord of cleaners to clean the plumbing and the slime keeps coming out. This may look nasty, but it is a good thing. You are getting it out little by little. Jetted tubs can be a very frustrating experience as compared to hot tub purges. In hot tubs we use sanitizers and other chemicals to kill bacteria, fungi, yeasts, mold and a plethora of other contaminants. Sanitizers also oxidize or "burn out" organics like exfoliated skin, hair, oils, antiperspirants, lotions, creams and a wide assortment of things. In a jetted tub you get most of that same stuff but not the sanitizer or other chemicals to add as a weekly maintenance product. So, gunk builds fast and furious in jetted tub plumbing. Years may go by before anyone says, hey, we should clean this thing. I see black, brown, green and a variety of other colored particulates spewing out the jets every so often. Now you have realized that this purge can be a good thing. Remember, in a jetted tub there could be years of cumulated build-up in there. Jetted tubs can take up to 20 or more purges before you finally get it clean. One lady who used her jetted tub everyday for years told me it took her 64 purges with our product before it was clean. So, keep at it. You are using the strongest and most effective plumbing cleaner that we know of. We have tested every major brand and we can assure you that the Ahh-Some will do it better and faster. You've seen this already based on your posting where you say you have tried many protocols and it is still not clean. That little 2 oz container for around $30.00 gets you up to 24 purges. You may call our office anytime and we will do all we can to assist you or answer any questions. Our phone number is on the lid in big bold numbers. Yes, we do answer every single call. Sorry for the long winded post but this is important to know when cleaning a jetted plumbing infrastructure. One final point! In over 25 years our product has not damaged one part on any hot tub or jetted tub no matter how many times you use the product. It is a non-acidic product and has a very extended shelf life.