well since i decided to use the 3 bulkheads that meened i needed to learn about sumps .
What i found was a 36x16x16. previously a turtle tank with a ramp.
I took the ramp out . peeled out all of the internal silicon and bleached the tank.
then washed the tank with vinegar . then rinsed and rinsed . and rinsed
I decided on a simple 3 compartment sump design .. tank drains into first section . with skimmer . then an over under over bubble trap . then a middle section and then a return section .
I made the return section fairly large , as I learned with is where all the systems evaporation will be seen .
Had the glass shop cut me all the baffles , i siliconed them in and resealed the inside of the tank .. 5 days later .. leak check time .
I leack checked each individual compartment. all was good
hope someone like this thread lol