I have a Lowrance X96 and a Lowrance LMS-522C
The transducers are mounted on the back of the boat. One on the Port side and one on the Starboard side.
The LMS-522C causes the X96 to read the wrong depths.
What is the Min distance between transducers?
What else could I do to prevent interaction between units?

There is no min distance, unless you want to call it the length of your boat, and less then 20 FOW or so.

ABout the only thing you can do is adjust the sensitivity on the units to minimize the inteference, or change a transducer on one of them to 50 or 83 KHz, whichever it would be.

As far as I see it you have two options. You can only view one at a time, I assume. So one option is to "Stop the chart" on the one unit you won't be looking at and that will solve the interference problem. The other option is to link the two units with the network and just share which ever transducer you want and it will show up on both units.

Bullhead guide..... sounds like someone I know! How many bullheads can you catch on your lake?

There is no way of linking the two units togeather. Both units use a 20 deg. transducer at 200 khz. Is there a different transducer @ a different khz that will work on the X96?

There is no min distance, unless you want to call it the length of your boat, and less then 20 FOW or so.

ABout the only thing you can do is adjust the sensitivity on the units to minimize the inteference, or change a transducer on one of them to 50 or 83 KHz, whichever it would be.

So Shep are you saying that in 20' of water or less that the two transducers need to be at opposite ends of the boat?

Here is a quick explaination for what your problem is. Your two units most likely have the 200KHZ transducer with a 20 degree cone angle. Because your transducers are mount very close to each another the interference is generated when the cone angles of each trandsucer overlap each other so the signal from one transducer is being received by the other transducer thus giving you wierd indications on the screen of each unit you have. The 20 degree cone angle will cover approximately 1/3 the area for the depth you are in. If you are in 30 feet of water the cone angle is covering approximately 10 feet of the bottom. This coverage is in a circile with the center of the circle directly below the transducer. When these two circles converge then the transducers will start to receive the "Pings" from the other transducer. If you move one of the transducers to the bow of the boat and if your boat is say 20 feet long then the transducers will not "Cross-Talk" untill you are in approximately 30' of water or more. Sometimes you can eliminate this interference by changing the "Ping Speed" of one unit so it is not the same "Ping Speed" as the other unit. (if your units are capable of changing that speed.) Most people get away from this "Cross-Talk" between transducers by using two transducers with two different KHZ ratings as a prior post explained.