Green but healthy...

[emeraldking]

One of my tanks is green and I keep it that way...
Algae blooming is a very innocent version of algae. And it's very nutritious. I've done the same thing when I bred koi. Those baby koi only fed themselves on algae blooming. They grew very fast because of this. I'm doing the same with one of my mutt tanks.
Here I'm feeding them an adhesive food tablet. Just to get them to the front.

 

[Colin_T]

Green water is fine and I used to grow containers of it for rearing baby fish. Just add the fish eggs to a container of green water and move the babies into a bigger container a month later. No need to muck around with fry foods or anything because the baby fish can eat the algae and other microscopic organisms in the water.

One of the drawbacks to green water is you can't always see the fish. But the main issue with green water is if you don't have aeration. During the day the algae can use up the carbon dioxide in the water and cause the pH to go up. At night the algae use up the oxygen and cause the pH to drop. If the oxygen level drops too low during the night, the fish can suffocate. Having aeration stops or significantly reduces the chance of this happening.

But green soup and baby fish go hand in hand

 

[I Like Rare Fish]

I let algae grow in my outside tanks. Sometimes it enriches the fish…gives it something to do and explore. My fish like the hair algae in the tank.

 

[Lynnzer]

Algae is also a good source of nutrition for us humble humans too.
I just don't think it'll catch on quickly, just like going to the chip shop and buying squid instead of cod.

 

[emeraldking]

But the main issue with green water is if you don't have aeration.

This tank does have aeration. But it's standing on the window sill. That's why it can get green anyways...

I let algae grow in my outside tanks. Sometimes it enriches the fish…gives it something to do and explore. My fish like the hair algae in the tank.

I've got certain livebearers at my place that just love hair algae.

Algae is also a good source of nutrition for us humble humans too.
I just don't think it'll catch on quickly, just like going to the chip shop and buying squid instead of cod.

Well, in our country, supplements that contain algae are sold at the drugstore.

 

[Back in the fold]

@emeraldking This is one of those old things that every aquarist used to know but the youngsters were never taught, like aging your water. Knowing things like green water sometimes is the difference between success and failure raising fry. Some fry are impossible to raise without it. I know one fellow American Killifish Association member who swears he can't raise Pseudepiplatys annulatus without it.

 

[emeraldking]

@emeraldking This is one of those old things that every aquarist used to know but the youngsters were never taught, like aging your water. Knowing things like green water sometimes is the difference between success and failure raising fry. Some fry are impossible to raise without it. I know one fellow American Killifish Association member who swears he can't raise Pseudepiplatys annulatus without it.

It's also a fault of the commercial world. They tell the potential buyers that green water is a bad and unhealthy thing. So, they can sell some algae killers. They will also tell one that only clear water is the most healthy water for fish there is. But healthy water will show a bit of color.