Had a good conversation with Partobe today.
His main light is 2x24W T5HO, with individual bulb control. One bulb will be turned off, giving him medium light.
Although CO2 is optional at this lighting, he wants to give his plants the full benefit of CO2, so will be putting a pressurized system on order.
Several unsalvageable plants have been discarded, and will be replaced with appropriate selections for medium light.
And he's picking up some Flourish Nitrogen/Phosphorus/Potassium locally, in addition to the existing Comprehensive/Excel, to deal with nutrient deficiencies immediately; giving him time to look into other fertilization options without hurry.
Sounds like a plan to me.
I look forward to seeing updates.