should I upgrade transducer?

[tanycomo29]

I never have to look for fish in water depths deeper than 100', my question, is a transom mount air max p66 I've been using the last 3 years getting the most out of my 588?

 

[Johnny Electron]

At that depth, I would say you are. You might get a bit more sensitivity going with a 1kw transducer where the elements are optimized but you don't need the extra power, expense, and installation hassle.