I found a used 10 gallon fish tank with an aquatech 5-15 filter. Good enough for an10 gallon? They have Marineland penguin cartridges which threw me off at first. But the very dusty image of the filter is the aquatech 5-15. Filter new The tank is for a betta and maybe an African dwarf frog. Not heavy use. I'll be doing my own sponge, batting and bio stones. Need to know by morning. Thanks!