I would do some research on dry ferts. They may not be necessary for you tank, but I think it costed me $20 bucks for all the ferts I will need for god knows how long. All you really need to dose is KNO3, KH2PO4, and a micro mix. I syphon with my mouth too and you wont need to worry about them. If your worried about excel, diy co2 is really easy to set up and all it does is pump co2 in your tank. These fertalizers are basically chemicals that your plants need to survive, like KNO3 adds nitrate to your tank because if you have enough plants in there your fish wont be adding enough for them.