The result is truly amazing, some 8 weeks later nearly all the sludge has disappeared. This stuff is incredible! It has even “eaten” all the sludge in my mechanical filter sumps and the bacteria filters are virtually clear of any of the excess deposits which caused all my previous problems. The gravel areas are entirely visible and I keep having to look twice to believe what I have seen.
E. Senescall, Swindon, Wiltshire