Just added another 350 today. Is it just me or do the filter cart always suck that come with the filter? My other penguin 150 for my 20g the cart were cheesy to. Not like the replacement packs you buy.
I was reading this as I just purchased two penguin 350s, thanks for the info on the rebate.
I noticed the filters do not do a good job on polishing. I added a AC 50 sponge behind each cartridge. The instructions say there are two slots so that you may put additional media. Anyone see any issues with this?