I had ADF's in a 10 gallon tank and recently rehomed them and am now turning it into a shrimp tank. The tank has been cycled for 4-5 months. I'm running the ADF filter alongside a sponge filter I just got today so I can have only the sponge filter in for the shrimp. Right now I only have 4 juvenile cherry shrimp in the tank. So I have two questions: 1) Without there really being an ammonia source in there right now, am I even able to seed my sponge filter with just the BB on my original filter? I'm worried since I know shrimp are sensitive and I'd hate to take out the original filter and cause a bunch of issues with wacky parameters 2) If it is possible to get my sponge filter seeded, will the tank stay cycled with just shrimp in the tank? And if so how many shrimp would I need in there to provide enough of an ammonia source?