lisajane1969
Fish Fanatic
i have a four foot tank,currently has fluval 4+ filter in it,was wondering wether or not it would be better to run a external?all fish fine & happy in tank,do regular water changes,all ph,nitrite,nitrate etc levels are checked weekly,all fine,just wondering if it was worth changing over or not?& if so,whats the best external to look for & fairly cheap,many thanks 
