Ineed moneh..lol jk ineed help!!?

ok well not too long ago ibought a: Tetra AquaSafe. It Declorinates and conditions, replenishes protective slime coat &its for all fresh aquariums. I have 3 Betta fishes &iforgot 2 ask if ican use dis on their water which they only have like a little tank its tiny each fish bowl.&ineed this product because iuse tap water &ineed it 2remove all the chlorine. I did not see the sign in the bottom dat says use monthly & the amount ur supposed to put in der is 2 teaspoons(10mL) for every 10 Gallons(38 liters)of water. *My fish have less than 10 Gallons in each lil bowl so im wondering can i put some of this in der water like maybe a drop or so? or how much should i put in the water? *it wud be helpful if someone knew about this product or wat to do.