Like I said before , Multistack (multicrap) is like Ikea furniture , poorly designed looks like crap ,a ***** to put together ,requires lots of repairs and eventually ends up at the kerb on garbage day !!!!! but if you want some cheap crap then go ahead the salesman will be happy
A closed loop tower is the way to go with a Multistack. Even if you have good water treatment you could be spending lots of time cleaning the strainers. There is a option for stainless steel inlet headers that makes strainer cleaning alot easier. Alow lots of hours for maintenance.