All the bonus offers at Crocoslots come with a bonus code. When you make a deposit, the 'claim with bonus' options will automatically be ticked. However, check the bonus code automatically inputted by the casino because it may not the right one. Here's some of the bonus codes for your information:
CS1 - First Deposit Welcome Bonus
CS2 - Second Deposit Welcome Bonus
CS3 - Third Deposit Welcome Bonus
CASH - Daily Cash (0x wagering bonus)