Can I just rip tiny bits of fabric from danny boy's established filter, & stick them in the one's I want seeded? Should I put a handful of danny boy's gravel in each new tank too? Otherwise, I'm going gravel-less for now. Thanks :)
Even a teaspoon full of material is loaded with the good bacteria. Most pros will give you a handful of gravel when you ask for seed. The filter media would be better than the gravel, and yes, even a finger-sized strip would work.