I was thinking it was overkill too. some of the filter combo's recommend are great, but they could really be used on tanks 3x the size of the one we are talking about..
overkill is great, but on a 40g tank, it doesn't make sense to spend $300 for an Eheim and an AC110 in my opinion. doesn't make sense for a tank that size...
now, if you are planning on upgrading to a 125 in the future, thats different...
but if it were me, I would use a single AC110 or a Rena XP2.
a 40g doesn't need massive amounts of filtration..and its not worth spending tons of money if you don't really need to..
overkill is great, but on a 40g tank, it doesn't make sense to spend $300 for an Eheim and an AC110 in my opinion. doesn't make sense for a tank that size...
now, if you are planning on upgrading to a 125 in the future, thats different...
but if it were me, I would use a single AC110 or a Rena XP2.
a 40g doesn't need massive amounts of filtration..and its not worth spending tons of money if you don't really need to..