water bottle full of correctly dosed maxsea fertilizer that comes with applicator. You can use it on a sprayer but this is wasteful and requires more regular draining of the substrate. Apply a droplet of fertilizer every 2 weeks on a plant. Drosera right on leaf, sarracenia and nepenthes on a pitcher, and venus flytraps in the mouth of the leaf. This amount should be able to feed a small collection for a few years.