I've used Eheim Powerline 2252 internal filters for a while now (and love them!) so I thought it was time to take it to the next level.
So take your preexisting Eheim 2252.
Add an Eheim 3351.
Result? A pimped out Eheim mega filter!
But on a serious note. These Eheim 2252 are fantastic filters. I've yet to clog one even with my lazy cleaning and Panaque. They pump (almost a flat) 1200lph and can solely provide enough oxygenation/current for 120-150cm tank. The only downside (apart from the usual Eheim price) is it's power consumption of 28 watts. But if you want a reliable internal filter for large tank with large fish then you should definitely try one.
So take your preexisting Eheim 2252.
Add an Eheim 3351.
Result? A pimped out Eheim mega filter!
But on a serious note. These Eheim 2252 are fantastic filters. I've yet to clog one even with my lazy cleaning and Panaque. They pump (almost a flat) 1200lph and can solely provide enough oxygenation/current for 120-150cm tank. The only downside (apart from the usual Eheim price) is it's power consumption of 28 watts. But if you want a reliable internal filter for large tank with large fish then you should definitely try one.