REEF TANK HAVERS!!?? does anyone know of a good inexpensive ATO

recently had the ATO in my nano reef fail one morning, water level got low enough to mess up the pump bc i was gone all day, and it resulted in such an insane pH spike it killed a t. maxima :(

not only do i want to avenge my clam but i am in need of a new reliable ATO. if any1 knows of one preferably around or under 100 they have personal experience with i would appreciate that... ermmm