Toby only got 50liters k1 ,gettinganother 2-300liters,i,ve got 300 liters of static media in the first half of the filter.had the 50 liters k1 in another filter of 100 liters,it was fluidised with about 20-30 lpm.koi fellas say k1 works best at a 50/50 ratio k1 to water
brian
brian