I am using four t5 bulbs over this tank with pressurized co2.

The co2 system is provided by Azoo Regulator from Fosters and Smith.com

Then I am using eco complete as the substrate for the tank.
The light cycle will be 8 hours for two bulbs and then 4 hours for all 4 on them.

Plants I want to keep

Mayca Fluviatilis

Rotala Indica

Rotala Macaranda

Baby Tears

Ludwigia Broadleaf

S.P. Japan

Lloydiella, Golden Creeping Jenny

Rotala Wallichii (maybe)

Blyxa Japonica

I will be EI dosing the aquarium with green leaf aquarium fertz. I have questions about the diffusor for this setup and should I used drop checker or ph controller? also, I have a bubble ladder from a old setup. will this do?