I purchased a Gaggia Accademia a couple of months ago and absolutely love it. Recently the symbol came up 'decalcification'. My helpful husband (who never reads instructions) poured the entire decalcifier (which came with the machine) into the water tank without taking the filter out first. Now .... I have washed and rinsed out the tank a few times .... but is this enough? Does this filter get thrown out and I replace it? Or does anything else have to be done?
It should be discarded and replaced. When you descale the machine with the filter inside of it, it keeps and holds some of the descaling solution like it would with any mineral content or other impurities.