Oh yes, forgot to ask this. If the plants use up the nitrates should i stop the biological filtration or do they not need that much?
Don't stop the filtration. Just get some KNO3 dry fertilizer and add it into your aquarium. You may have enough fish and a small amount of plants to where you don't need to dose nitrates. Just keep an eye on it by testing every couple of days and see what your tank is doing. =]