One of the goldfish in my pond is constantly trying to swim around with its head above the water and never seems to stop. All of the other goldfish in the pond aren’t doing it and all seem to be acting normally.
The pond has a pump, fountain and a filter and the sponges are regularly cleaned when the get to dirty.
Whats wrong with my fish?

A fountain designed to stray a column of water 7 m into the air has a 2 cm diameter nozzle at ground level. The water pump is 2.6 m below the ground. The pipe to the nozzle has a diameter of 4 cm. Find the necessary pump pressure.

Tierra De Gracia is a southamerican nation in a timeless (Megapolis (NY) looks like a mix of Victorian London and 1940′s NYC) alternative version of our world (England=Albion, Spain=Hispania, U.S.A=Urbania). The nation was a little backward nation where only 15% of the population could read and the life average was 30 until about two decades ago when the Urbanians came and started to explote the water fountains and built water pumping camps and the gov’t happily gave concessions in exchange of having the 30% of the profits.
But the world was starting to be divided between the Plutocrats (Urbania) and Utopists (Transylvania). Urbania started to support the right-wing dictatorship in TdG; during this d-ship TdG becomes a modern nation under an iron fist. After a coup, it is installed a neutral democratic government that tries to survive the far-right and the far-left, but after the situation is stable, it becomes corrupt and even more during the careless bonanza years of the nationalization of the water industry
But Urbania starts to unfroze a glaciar and the water prices hit bottom, plus some insurgents Stara to grow thanks to the highly inefficient government and its corruption. A left-wing military man tries to unsuccesful coups and he is jailed but granted pardon by a the current senile supporting-hungry president. the military man is elected president, but he is turns out to be a dictatorial buffon with little-knowledge of how to manage a nation
He declares that Tierra de Gracia, now with no agriculture at all and a decadent industry that can’t beat imported goods, will survive without needing foreing influence so he cuts any link with the rest of the World (at this point TdG has runned out of water and has a rising foreing debt) and the last thing we know of TdG is that he lives in some kind of demential city-state created only to worship him and is destroyed because runs out of water
The last thing we see is the dictator jumping to a ravine followed by his entourage and his people

I reside at Kandiwali and would like to know where I can buy pressure pumps for a small fountain/waterfall and what would it approx. cost me to build one. Ideas to go about building one and decorating it would be helpful. Thanks in advance.

our fountains water is all green would bleach make the water white or just wreak the pumping sistem could you please help