Might look at an internal one as a second filter as this combined with my external would take me to 6 or 7 X tank capacity per hour which i believe is a better level of filtration.
No worries at all ive just finished mine so i know how you feel. Not had any luck on the mature media front so far. Not all that many scots on the list lol
Do you think adding a internal to up the filtration is a good idea? a few people have said i should be looking at 6x or 7x rather than the 4 x my fluval 305 provides.