@Raven and
@Gingero
Fox Farms is fine, its expensive, but its fine

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Like James said above, Fertilizer could mean many things, chemical ferts, you dont want. Foxfarms "OceanForest" and "Happyfrog", have natural ferts. OF has bat poop, and HF has Mycorrhizae and Worm Casings, both of which are useful, and actually mixing the 2 blends would be best.
There is also more than nothing wrong with Fertilizer, outside of CPs, and a few others, you will struggle to grow healthy plants without Fertilizer, its just not going to pan out very well longterm. However, Fertilizer comes from unexpected places, Bioactive Vivariums provide Fertilizer by your Cham popping, which is Fert in its own right, but the CUC break it down, and make more Fert, as they do with the Leaf Litter ect, its their job. When you see Ferts like "Bat Guano" or "Earthworm Casings" thats really all that is, Poo, mix your Chams poo in the soil too, more Fert

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I would personally even add CUC, and Cham Poo, to your potted plants. As you still want Fert for them as well, for the best health for your plants. Plants need food too, and thats what fertilizer is, food for your plants. They are fed in Nature, from the various bugs and animals that poo, and breakdown the various things, to feed the plants.
Alot of folks, I know think their plants die, because of bad or lack of lighting, but I bet most of the time its more a lack of nutrients. If your using RO water, covering the soil with rocks, removing all poo and using acidic nutrient deprived Eco Earth, your plants have zero nutrients available, ever. Some plants, like Carnivourous Plants, are adapted to this, and have found new ways to get nutrients, like CPs eating bugs. They would prefer to be in Peat or Sphag, that is very acidic and nutrient free, they grown in Sphagnum Bogs in Situ, and have adapted by eating bugs. However the majority of plants, need Fert IE food.
In Ravens case, I would just add CUC, and let them deal with the current poo, and what falls in let it fall in. Add after awhile, Fert does not last forever, your Foxfarms is very strong Fert wise for the first 30 days, so dont add poo during that time, too much nutrients can burn the roots. Your soil will be well ferted for about 3 months though, after that it will taper off, and then I would add poo that you find, to the soil, with CUC ideally.
Fox Farms, also is not the best draining soil, most folks in Horticulture that use it, add Perilite. If you dont want to add Perilite, due to impaction risk, you can add some reptibark or fir shavings, orchid bark, tree fern, ect, whatever you want but I would add something, to allow it to drain a little better. It is also on the acidic side, and lots of folks add Limestone (Calcium Carbonate) to buffer the PH, especially if using RO water. That depends heavily on your plants, and what they like, lots of plants like acidic soil, some dont but will get use to it, feeders will drop CC and buffer it over time anwyay, so no worry there, was just a note.