Well I recently decided to go with live plants, not really knowing anything. The rep at the pet store told me the light I already have and the fishes waste are all the plants need. Since then my plants started dying and I learned about liquid fertilizer and liquid carbon, but the fertilizer is dosed weekly and the carbon daily and I realized this is gonna add up quick and cost a lot of money in the long term. So I want to know where’s the cheapest place to buy these?? Possibly in bulk and online? TYVM!!!