i see here and on a lot of forums all over ppl always saying you need 'x' amount of gallons per hour for different setups and then use what the manufacture says on the box as a guide...
what i am saying is for example it isn't uncommon to hear that for a cichlid or goldfish tank you need 10x gph
, a 70 gal
tank would need 700gph, so if you were to buy two rena xp3's rated at 350 gph
you would be fine with a total of 700gph, HOWEVER the actual flow rate of a rena xp3 after filter media and pipes is only 180 gph
, so even having two would only give you 360 gph
, which is only about 5x the filtration...
so the question is when ppl are saying you need 10x or between 2-3x filtration are they going by actual gph
or advertised gph
and as a side note has anyone made a collection of data of all the major filters out there and their actual gph
i tested my xp3's using a 2qt jug, and used a stop watch to time how long it took to fill it, 9.98 sec, divided that by 60, 6.01, multiplied that by 2, 12.02, multiplied that by 60, 721.44 and finally divided that by 4 which gave me 180.36 gph
i thought it would be cool if everyone did this with there filters and we made a data list of all the filters we all use for reference...