George&Ade
Fish Crazy
Hi.I purchased my tank second hand,and the previous owner included the above filter/heater.When i got it home and looked inside,everything seemed to be ok but when i looked at the instruction booklet,it states that i should be using something called "biomax rings"in the "trickle chamber" instead of the "cotton wool/wadding" that i pulled out.I understand that this is a very important part of the filters operation,so is it imperitive that i use these "biomax rings"?..thank you.