I'm needing some advice for what sponge filters I should get. I'm wanting to get 2 - both for 10 gallons, one for a betta and one for a dedicated shrimp tank. There's so many options - eBay, aquabid, Amazon - my head is spinning. I've looked at some dual sponge ones where you don't rinse both sponges at once so don't lose BB. And some other ones that have like layered/stacked compartments where you can put extra media. I've only ever used internal or HOB. So if I could get some recommended types, brands, Amazon links lol that would be awesome! Thanks!