Day passes are 45% off if you purchase before 6PM Eastern tomorrow. Including tax they are 29.27 Canadian or $23.02 USD.
https://www.fallsviewwaterpark.com/day-pass-sale/Been here three or four times with the kids and it is the largest and cleanest indoor waterpark that we have ever done.
They are also usually open on Sundays and Mondays during yeshiva week and the park is practically empty then.