After a few posts on this and curiosity on some specs how about we set up this post for filters and there rates both clean and established. I suggest this also covers some other basic details like filter Size, Volume and Media Compartments. This should help when deciding what to use for a filter in your planted tank. Test process to be done with no spray bar or other fittment after the u-bend. If possible can you state if the outlet is at tank height or not. If we get a range i will post the lowest and highest figure. any unique but useful test can be noted. once there is some concensus on this i will edit this post with a better description and subject. Im suggesting the following stats per filter. Make & Model Dimensions - Volume - Compartments Manufacturer Rate Tested Rate: Clean, Established E.G Tetratec EX700 Size(cm) L21xW20.5xH42 - Capacity 6.6L - 4 Compartments Manufacturer Rated 700LPH Clean Tested - Actual Rate 290LPH Established Tested - Actual Rate ???LPH Im happy to populate this list with the common data for Rena, Fluval, TetraTec and Ehiem if we feel this is of use. I will arrange the list in alphbetical order or rated flow??? thoughts please. PS Im taking it this list will need more than one post. Is there a limit to post length????