Originally Posted by Wydukey1991
That's about 12% of your monthly electrical bill.
IMO that's a small token if you consider that you'll make that money in short time (compare to running all those electrical driven filters 24/7). The most costly item, the blower, you already have it.
If you are looking for 30 used sponge filters it might take awhile to gather that many and not necessary the sizes you need. So you might have to buy the sponge refills, which YFS also sells (the Hydro brand), at a fraction of what the whole sponge filter costs.
I know, because I just got them from them and I wish I had done it months ago. And they costs about 75% less if you already have the guts, which you can buy used.