Mine sample everything that goes into their tank. They are many years old and breed regularily. I have L134s and a clown pleco with them, so they have access to algae wafers as well. I saw them try the algae wafers before too. Has not caused them any harm yet. They will know what is good for them. As long as you feed them their bloodworms, they will be ok.
20g L46/hastatus/pygmy corys, 10g OEBTs, 10g blue bees/blue velvet shrimp, 10g CRS, 15g L174s, 10g yellow shrimp, 15g clown plecos/L340 fry, 25g L134s/CPDs, 29g Weitzmani/panda corys, 46g L134s/salt and pepper corys/BNs, rubberlip pleco, 55g SAE/L201s/L199s/BNs/kissing gourami, 75g L316s/BNs/old fish folk, 30g L340s/L211s/CPDs/micro rasboras,10g tangerine tiger/snowball shrimp, 20g L134/habrosus corys, 10g CPD fry