| Re: Plant Fertilizer & Lighting In my 30g. tank I have one 20W lightbulb. It seems to be working well for my plants. My plants are low-light and I've had them for months now. I do, however, add a liquid iron fertilizer every once in a while. I use Hagen Freshwater "Plant Gro" Fertilizer (Iron Enriched). I used more of the iron fertilizer when the substrate was new and therefore the plants had nothing to feed on. But after a while, when there gathers enough of sediment and waste in the gravel, the plants start feeding on that and you don't need a lot of fertilizing anymore. |