My RTGG goes mad for the fattest longest earthworms i can find in the garden. There's also a copious amount of slugs to hand but i haven't tried her on these yet. It's the slime that's putting me off, they're way slimier than worms. Will the slime be digested as a nutrient rich food source or will it get "evacuated" shall we say as a waste product thus creating havoc with the whole filtration system and general cosmetic look of the tank?