Thanks for info. I was using the Omnipole filters where the last bottle was a spectrum sealed resin bottle so no need to use lose resin but they was quite expensive. Changed the system and bought the 25L Di vessel filled it up about year & half ago, the way I filled it was fill near to the top leaving around 4 inches but pour in dry using a small cone they was easy, then I had to push the plastic stick thing down which wasn't to bad until the last bit was really hard but managed it in the end. I gotta now change it which never done but will have ago filling half pouring water in then more resin hopefully should be easier to push plastic rid in !!!👍