I bought a 135 used, and it came with a tetra DW 96-2 worked for me for about 6 months, not sure how long i was used before I got it. When that one went out I bought a tetra 100 whisper, its lasted about 4 months. Tank is 24 deep, running 2 12" stones, pump under tank in stand. Any suggestions on a good pump that is going to last? Thanks.