Thats weird summer I have never had a salt build up with fox farm as they are the most forgiving nutes on the market and I have never heard anyone who had any salt build up using them usually thats a MG nute,advanced or canna nute issue. The fox farm big bloom is made from guano so you shake the sediment up to get a good mix like all nutes but fox farm are almost full proof and my favorite and great for new growers since they are so simple and forgiving. I max mine above the chart levels with ease