No, some of the best are very elaborate & attached at one end. remember, the more you aerate the water the less likely you are to get algae & save money in chemicals.
If it is a rather large waterfall, the water is filling up the bowls in the waterfall till it spills over back into the pool. If you have to keep adding water after using the waterfall it could be a leak in the waterfall itself. If you don't have to add water when the waterfall is not in use and you do when you use it, well, guess what? Probably a leak in the waterfall. If it is a natural rock waterfall look for cracks in the grout between rocks. If artificial rock, look for cracks everywhere.
Probably shocking it and adding an algaecide wouldn't hurt.
Anything having to do with adding or subtracting unlike fractions.
You must go to Mt. Coronet and start going up the trail to Spear Pillar. However, when you get to the waterfall inside the mountain, use Waterfall and go up it. After you do, whip out your Super Rod and go fishing right on the W edge of the Waterfall, facing out. (edit by Pree2: just adding that use a max repel to increase the chance of dratini apearing! Good Luck!)
By adding unwanted voltage to the desired signals.
The same way as now (minus the calculators.) The problems were the same, adding, subtracting, division, multiplication, exponets, subsets, etc.
Adding and subtracting unlike fractions.
An infinite amount because there are an infinite amount of numbers that you can keep adding to.
you have to find a common denominator first, then you can just add them together and get your answer
Anything having to do with adding or subtracting unlike fractions.
The maker of the package
you call them problems because you need to figure it out and it could come in your life and you have to figure it out