6205 on peninsula 180gtank? one enough?

[Milad]

will 1 6205 be enough for a 180g penisula tank?
or should i be looking at two 6105s?

 

[rvitko]

2 pumps is always better, it adds a safety in case a pump fails or needs service and being able to alternate the direction of flow helps eliminate dead spots. I would go with 2 6105.