I'm going to replace the pool frog with a standard chlorinator (frogger cover is leaking, new cover is about 40, o-ring alone is about 20) I dont want to waste more money on this product.

Should I go with inline or offline?

The frogger is inline, and has 2" pipe in and out, the hayward inline chlorinator I'm looking at has 1 1/2 in and out ports, if I use this one I'll have to reduce my lines. Will this cause any problems with pump or flow?

Thanks
Rob