I have a question. I was just was given 2 - 40g breeders that i plan on using sponge filters on.
As you probably know, FX6s say they they can filter 400g and have a 925 GPH rating. We also know, that rating is not accurate because they are based on no media in the filter and no head pressure. I have always been told to cut the 925 GPH in half, and that closer to their real output.
Which leads me to my question....
Should you upsize a sponge filter in the same manner? Is a sponge rated for up to 40 gallons sufficient, or should i go up to one good for 75 gallon?
Not sure what i plan on doing with the second 40 gallon, but i am starting off with 2-3 baby EBJD and growing them out in this 40 gallon, so the bio load will be small at first, but will grow. EBJDs get hardier as they grow and i plan on keeping them in there until 5-6 inches.