yeabuddy.......
Easy test for you.... Buy a cheap, clear plastic fitting for your dump connection, so you can see what flows by when you dump. After a few days sitting in your tank, when you dump, you'll see few, if any solids going through the hose. Sufficient amounts of water in the tank really does get everything to liquefy quite well. Seeing is believing.
We use the cheapest Campa-Chem from Walmart. $1 per bottle and we dump about once per week, so for $4 per month it makes me happy to use it, even though it probably does nothing for me.