pH profile.
Get a cheap pH pen of eBay/ amozan
Take pH every 30mins from CO2 on till lights off
Do a graph. At lights off note the DC colour and pH that's target pH for lights on ( assuming your happy with colour pH change) my pH drop well over 1.0pH and DC light yellow in one tank and clear in other, these levels are pretty high and carry risks OFC. With a pH drop of 1.0 you should be fine and light green DC. PH pens are not accurate so the actual pH may ( or will ) be different from what the pH pen says but that's irrelavent it's the profile that's matters. Set the BPS at a rate that keeps the pH stable from lights on till CO2 off. Once you have your stable pH with BPS your corrosponding pH profile will let you know when the CO2 needs to come on. It may take 2 hrs to get target pH for lights on. One of my tanks takes 3 hours! But it is what it is having a stable pH from lights on till CO2 off is critical. Most plant issues in CO2 injected tanks are due to poor CO2 implementation with fluctuating CO2 levels and poor flow being the main problems.
I would start at 6hrs and 50% intensity for at least 4-6weeks.
If no programmable intensity well no choice except get the pH profile right.