Anyone have any personal experience with siporax? I currently have a red sea reefer 350 with about 45lbs of live rock and was looking to add a marinepure block to the sump to boost filtration while keeping my minimalistic display . After reading some threads about the marinepure block leaching aluminum, I started researching alternative options, thus I came across siproax. From what I've read, they recommend 1l of siporax per 100l of water. I am having trouble finding a seller of the 25mm version of it. If anyone has any experiences with siporax or knows where to order the 25mm feel free to help me out.

