Good luck mate! Isn’t that a bit much on the recirculation though? Too high a flow I mean?
No that’s not too much for my return pump in my 4 site veg setup with 8gal buckets but actually holds 5gal with 2in PVC and bulkheads…I use a 500gph pump for h20 return and I use a alita60 air pump does like 70lpm actually…And it’s just fine as is…