What size pump should I use with Smart Level?

Hydor Smartlevel isnt issued with a pump as this is for the end user to decide. The Smartlevel unit will run a pump no larger than 50w . Hydor recommend that a 250 or 400lph should be ideal for top - up purposes as you will only need to top up a few litres of water daily. Hydor recommend Hydor Pico 250 (P16300) or 400 (P16400)  for top up from Refill to Sump &Hydor  Pico 600/115 (P14200)  for top up from Refill tank directly to Aquarium. (NB, Hydor Pico pumps do Not fit through the opening at the top of a 25litre container.)