Nitro is a concentrated source of nitrate for aquarium plants. It is phosphate free.Daily dosage:10 ml per 500 litres increases NO3 concentration by 2.0 ppm and K concentration by 1.3 ppm.For our full range, see our website at http://seasideaquatics.co.uk. For our range on eCRATER, see our shop.If there are any problems with on delivery, send a photo and a full description of the problem within 12 hours of delivery. We recommend that photos are taken on a white background, for example on a white towel or a sheet of paper.