Saltwater Mixing Station Critique

[SlothMartin]

Hi would you guys mind pointing out anything i should or could do differently with my saltwater mixing station?
this is all just dry fit and no holes cut in the tanks yet, aside from the bulkheads that came on it.

the first picture is intended setup, 2nd is with the manifold tighter to the tanks to keep it more compact, but then i have to run 90 degree runs through the top bulkheads which i am not sure is worth it

specs for those interested:
55g roto molded tanks from "emergency water tanks" which had free shipping which made them pretty cheap compared to others i have seen
blue for RODI and grey for salt
3/4" schedule 80 fittings from BRS. kept at 3/4" just because thats what the bulkheads were so i didnt have to have a step up/down
pump is a jecod 10,000 (same as display return so can be used as a spare)

will have a port/bulkhead in the RODI tank so i can pump fresh rodi in. eventual plan is to have RODI lines run straight from the filters into the RODI tank, and then a hydros duet from the salt side (if they ever release it) for auto water changes so its pretty hands off. plan is for this to eventually go to the basement
until then ill pull the saltwater from the tap in front with a hose to the tank.

issues i am thinking about
- if the saltwater is not totally empty and i pump a full tank of rodi in, and exceed the volume, how do i prevent overflow? auto stop linked from a float valve to the pump running on a hydros unit?
- i have to have salt on top so i can pour the salt in. that means when i pump from RODI to salt i will have a 400lb tank of water sitting on an empty tank. is that OK? i assume so since they are made to be stacked, but will test in the driveway first
anything else i am not thinking of?
next steps are to drill top bulkheads for the pump, ports to manually add RODI, and then glue up, pressure test outside

 

[SlothMartin]

almost forgot, thanks you @Kongar the idea and shopping list were all ripped straight from here
https://www.reef2reef.com/threads/detailed-mixing-station-plan-complete-parts-list.982896/

 

[MakingMistakes]

Like the tanks but they do make you blind to what’s happening inside.

I would use a single line to gravity fill the bottom tank with no pump needed and mix with a powerhead.

As for knowing when it’s full that’s easy, just listen it will go silent when it hits the inlet.

Ok I see you want salt on top to be able to pour it in. That complicates this a lot. I’d figure out a way to have salt on the bottom.

 

[SlothMartin]

Like the tanks but they do make you blind to what’s happening inside.

I would use a single line to gravity fill the bottom tank with no pump needed and mix with a powerhead.

As for knowing when it’s full that’s easy, just listen it will go silent when it hits the inlet.

Ok I see you want salt on top to be able to pour it in. That complicates this a lot. I’d figure out a way to have salt on the bottom.

haha thats what i wanted as well! ultimately you need a way to access the top of the salt container. In a perfect world that is a side by side set up which makes everything easier, and a garage makes that set up easy. I live in a cold climate so this will go in the basement for temp control, and that makes the smaller footprint of the vertical setup much preferred.

Anyways, this is finished and running, works perfectly so far. right now the way to get water in is a bulkhead on the front of the fresh tank (you can see the flat slanted portion at the top) and the way to get water out is the out put on the middle top of the manifold.

Later on this will have a hydros duet run continuous water changes automatically, with rodi input lines and auto shutoff in so no more large lines needed, and a hands off water change experience. (waiting for the duet to release)

thank you for the input!