I ordered an Imperial Berkey with 4 elements at the beginning of May. We decided to use 2 filters and keep 2 for storage. After about 3 weeks of use, out of the blue the water started filtering very fast so I tested and one of the filters was broken - red water dripping out. I contacted the company I ordered from and they sent a replacement filter with a pre-paid shipping label to return the broken one. I tested the new filter and it was fine so we dried it out and stored it. Now tonight the same thing has happened! Refilled the unit like we do every night and I noticed it filtering faster than normal. My daughter got some water and said it tasted like "sink water". So I did the red dye test again and both filters are broken. One is really dripping the red water, the other just has a hint of pink dripping from it. This is so very discouraging. Has anyone else been having this problem with the filters? My husband wanted the Berkey for survival purposes but this is very unreliable and now he is talking of returning the whole thing and getting our $400 back.