Any recommendations on swimming pool grout that isn't as costly as Crocodile brand, but still as effective?   5K baht worth of Crocodile brand grout barely covers a small section of the pool.

A 20 litre size tub of Weber is just under 3 K. 

Don't know why you are paying 5 k?

 

Any rate, don't use anything else other than these 2 or you will be re-grouting in NO time!! 

 

They are specifically formulated to take the harshness of swimming pool water. 

OK, Weber brand huh?  I didn't say we had a 20 tub liter, merely mentioned that fact that 5k worth of crocodile didn't go very far.  Thanks for the Weber recommendation.