Waterlife Aquarium Tropiflora Plant Food 100ml Bottle For Aquarium Plant GrowthPromotes aquatic plant growth. Iron rich balanced formula. No phosphate, nitrate or copper. TropiFlora is specially formulated to release it’s plant nutrients and trace elements slowly over a 10-12 day period. Contains potassium, which helps prevent yellowing in plant leaves. Suitable for tropical freshwater & coldwater aquaria.