16,000 glns is a lot for a house waterpond.
plants + fish, are the basic elements to keep an ecological balance in your waterpond.
plants will provide shade that will control algae and filter the water.
fish, are neccesary to control mosquitos. they eat the larvae.
If you have green water, what i think is your problem. you may have some floating algae in your pool.
dont worry, some kind of algae are even good, those that grow around the stones, because provides the natural look and remove the nutrients that feed others algae (the bad one)
anyway, you want solutions.
here are some: (If you speak spanish, let me know, so i can explain it better in my mother language).
1.- Algae, multiply in full sun, so, you need some plants around your pool and water plants to provide some shade. plants, will absorb minerals from descompsition of excrement from fish and delivery oxygen to the water.
you can get several water plants in jardin botanico in santo domingo.
2.- Waterfall help to keep the water well oxigenated, but if your waterfall does not run enough water, according to the amount of water that you have in your pond, it does not bring enough oxygen to keep the water clear.
3.- you can consider a biological filter. the filter will convert ammonia and nitrites, produced by fish, plus uneated food in NITRATES. that way nitrates can be taken up by plants or fish.
4.- the use of algeacides helps. just use the right amount.
try to keep the water level.
if you cant find water plants in sosua, let me know, maybe in my next trip to sosua, i can take some with me.
hope you can solve the problem.
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