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  1. S

    Eheim 2128 not heating sufficiently

    What temp does the room with your tank in drop to overnight? I've no experience / knowledge of the 2128, but the recently rediscovered booklet accompanying the heater that came with my tank many moons ago talks in terms of 'delta T', i.e. the relative change in temperature you need to achieve...
  2. S

    Filtration

    I think LondonDragon meant wpg as in Watts per Gallon. Take your total light output in watts, divide by the volume of the tank in US gallons, and you have a rough idea of whether you have a low, medium or high light tank. 2 or more wpg is generally considered high lighting I believe, hence the 2.
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