You can get a very good idea of what your fish population is by keeping catch records.

Also seining is another inexpensive technique and the proper time of year to do it is right around the corner.

The homemade electro shocking devices I know about are (so I've always been told) more effective on catfish then bass and bluegill.

"They that can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety."- Ben Franklin

"Timid men prefer the calm of despotism to the tempestuous sea of liberty."-Thomas Jefferson