Thanks for your reply for the purpose of discussion this question would be primarily focusing on Neos using an inert substrate. I have successfully kept them using straight tap remineralized with salty shrimp gh+. What I have observed is they do okay but I don't think they breed and thrive as well as they could based on reading and seeing others tanks for the last couple years. (8.2 ph 4-5gh and 9-10kh with tds of around 300)
I am getting close to setting up a rack with a TB tank, a sulawesi tank and 3 Neo tanks. I already have an RO system still in the box in preparation but I want to have the ideal params for all three types and since I am in the preplanning phase I'm trying to have an idea for water management before beginning.
In theory I would like to have 3 separate water change containers prepared in advance for each type along with straight RO for top offs.