I have a very tiny pump that might work for your needs. Will try to find the info on it. It's 110v and very low flow. I won't be able to get the info off it until later today.
you're looking for something like this... http://www.discount-pumps.biz/fountain-pump.htm (fountain pumps)
if you happen to find something in the 1-2 gph range it's not going to accomplish a fountain or waterfall of any sort. 1gph is about a drip every 1-3 seconds. it would be mighty disappointing imho.
EDIT: do yourself a favor. take an empty gallon jug... put it in your sink under the spigot with the water flow about how you'd like it in your setup... time it to find out how long it takes to fill up your gallon. see how many times that goes into an hour and you'll know better the gph you're looking for... then overshoot that by at least 60% to account for muck and buildup that'll slow your flow.
I have a very tiny pump that might work for your needs. Will try to find the info on it. It's 110v and very low flow. I won't be able to get the info off it until later today.
60 gph is barely moving water. i wouldn't call that cascading falls. furthermore cascading would have to be designed... it has nothing to do with gph.do yourself a favor. take an empty gallon jug... put it in your sink under the spigot with the water flow about how you'd like it in your setup... time it to find out how long it takes to fill up your gallon. see how many times that goes into an hour and you'll know better the gph you're looking for... then overshoot that by at least 60% to account for muck and buildup that'll slow your flow.
60 gph is barely moving water. i wouldn't call that cascading falls. furthermore cascading would have to be designed... it has nothing to do with gph.
also... a 60gph pump isn't going to pump 60gph... especially straight up... especially after some time in use.
5 gph is basically less than what comes out of an airline tube when used as a siphon on a 5 gallon bucket on flat land... barely a trickle. 1-2 gph is just a steady drip... less than some leaky faucets.
a small adjustable fountain pump will likely give you exactly what you're looking for since it's... adjustable.
i can accomplish the effect you're talking about in a 10 gallon tank with 200gph or more and still have space for inhabitants... it's all in the design.
this may be a better fit for you... http://www.filterace.com/detail.aspx?ID=1337
either way... if you know how much water flow you want it would be a good idea to do that test. otherwise you're jumping into it blind and just guessing... which it seems you're doing. either way a 1-2 gph fountain pump is not going to pump anything past the height of the output... it's just not going to happen. a dosing pump or something similar would but, not a fountain pump that can be run 24/7 without damage.
i think you now have the info you need. if you choose to ignore it that's your prerogative. good luck.