The Zoo Med Aquatic Turtle Giant Banquet Block is a fun food and calcium treat for your turtle. Whole turtle food pellets are inside a calcium base， helping to maintain your turtle’s beak. Some turtles will bite aggressively， while others might curiously investigate the block. As the calcium dissolves， the exposed pellets make for a tasty feast. The calcium helps to neutralize acidic water， too， though you should routinely change the water when using this block.