R Robert New member Sep 19, 2009 #1 it is 40 litre tank with 6 fish and the filter is JBL i80 with ceramic & carbon inside, i am curently changing apx 20% of the water every 2 weeks. Is it a good idea to invest in a gravel vac?
it is 40 litre tank with 6 fish and the filter is JBL i80 with ceramic & carbon inside, i am curently changing apx 20% of the water every 2 weeks. Is it a good idea to invest in a gravel vac?
