Jamepsss
Fish Addict
it's 6 months to a year. You then supposed to get the JBL 7 + 13 Root Fertiliser Balls, this then adds back to the aquabasis.
Oh. In that case my Aquabasis is pretty much exhausted
Edit - knew I'd read it somewhere...
http/www.jbl.de/en/aquatics-freshwater-products/detail/2348/jbl-aquabasis-plus