Hello there swampman thank you very much for your interest , i have grown in pure coco before that was strawberry cough and uk cheese , however this grow is not full coco .. it has light compost mix with perlite , bit of a blend to be honest, i actually really love coco i have never had problems with it.. to be fair ive had more trouble at times with soil mixes being too nutrient hot and as we know with coco it is what it is hehe, i cant awsner about the excess salts but maybe its something i should read into if i want to use full coco in the future. im using biobizz products as always.. never tried anything else .. i kinda not into trying other products .. weird right ? well .. thats what people say to me but if i like what im using and im happy with the results why change.. maybe in the future hehe , i have been tempted to try fish-mix.. if you have used it before let me know what you think , and yes airy is the way forward hehe , thank you very much again for your time dude .