I converted one of my reef tanks to planted tank as well. If your tank is reef ready with sump is probably not ideal because of Co2 dissipates at a faster rate with that much surface agitation, because of the sump. Although others use sump in a planted set up, but they compensate by injecting more Co2. If your tank doesn't have built in overflow, the recommended and most used filters are canisters which you can connect Co2 reactors for better diffusion and saturation, using of course a pressurized Co2 which a lot of them to choose from, anywhere from $100 aquatek to $200 GLA Co2 regulators, I like the GLA with 3 year warranty. For lighting, I used ATI bulbs as well which are not ideal for plants. I would say 6500 k to 10k, you probably have blue plus, coral plus, purple plus or aqualue special, unfortunately you need to replace them. For heater, whatever you have now is good enough. For substrate, I use Eco complete but a lot of substrate to choose from and type of set up, I'm sure someone will chime in on this part and for plants as well. Good luck with the project, you'll lve it.