Advice/Help With Sump Order

[Billyjose4]

Hi Everyone.
Planning on setting up a 225gal mixed reef tank.
Looking for some guidance on where (and what order) to house all my gear inside my sump.

Here is my plan so far:
Red section (drain): 2 Red Sea Rollermats
Yellow section: Protein Skimmer
Green section: Bio Pellet Reactor
Blue section: 2 DC return pumps (~1500gph each)

Questions:
1. If I want to add an ozone reactor, where should I place it?
2. I want to include an ATS... where should I place it?

 

[shakacuz]

what size sump are you going to run? 55G?

 

[Billyjose4]

what size sump are you going to run? 55G?

Probably 75g (60x18). DT is 72x24.

 

[shakacuz]

Probably 75g (60x18). DT is 72x24.

i think your best bet to run the ATS would be before the skimmer, but in the same chamber, if that makes sense? but i don't think it really matters in terms of placement. not sure about the ozone reactor.

 

[Billyjose4]

Makes sense. I've also read to place the bio pellet output as close to the skimmer intake as possible.
Wasn't sure if the skimmer needed to be before the other gear, or if it's a wash. I read a lot of differing opinions on skimmer placement.
Not sure what to do about ozone. Hopefully someone can advise.