Yes. Different treatment options are available, but use treatments formulated for your dosing system. The number of treatments you can dispense at the same time depends on the model.
Dosing System SL
The Dosing System SL uses Simple Solutions SL treatments and holds one treatment bottle at a time. It does not dispense two different treatments simultaneously.
Smart Pond Dosing System XT
The Smart Pond Dosing System XT uses XT treatments. To dispense two different treatments simultaneously, add the optional Controller Add-On Kit #40042.
With this kit, the XT system accommodates two separate 64 US fl oz (1.89 L) treatment bottles, each with its own controller and intake assembly. For example, you can dispense Maintain for Ponds XT alongside Clear for Ponds XT.