hammerdave

i have have a 180 jewel tanks with 2 x Angels, 10 mixed guppies, 2 small plecos 2x pakastani loach 10 x neons. it has silk and plastic plants with sand as a base.it is second hand from a small shop. over the past 2 weeks i have started to lose fish. what i have found is that some of the sponges and cirax were missing from the filter this is now sorted. the question i have is when will the filter?