my aquarium water has turned green, filter is fine and no fish are dead, what is wrong, how can I get it clear

Question

thirty litre tank, just changer from an under gravel filter to a stingray underwater filter, but water has gone gren and cloudy and won't clear. filter works fine and no fish are dead.

Answer 1

This sounds like algae it is generally caused by sunlight , will not hurt fish you can scrap off are buy a catfish are plecoustomus to eat it. Below are a couple of links explaining algae and control of it I bieleve the second link woul be best for you.

Answer 2

This seems to be a natural part of habitat if the algae is that much of concern first I would make sure the tank is not by any windows, as this will cause algae to grow more. Also make sure that you dont leave the light on at all times this will also cause access algae. Most fish do fine with algae it is just a problem for most owners because it dosent look very attractive. Try investing in buying an algae eater . I find that per ever ten gallons of water in your tank have two of the little brown ones. Hope this helps :)

Answer 3

*****added note on this question***** We have algae eating fish in the aquarium, the filters are new, and there aren't any plants in the aquarium, no decorations even for that matter. The tank isn't in a place where it's going to stay for long so we haven't done all the decorating in it. All it has in it is fish, filter, heater, and the bubbler. There is a small fake tree root looking thing we got from petsmart in it but that's in there cause it holds the bubbler down because it likes to float to the top. It turned green over night pretty much, and keeps getting worse. I added a this solution to it that I got from the pet store that is supposed to get rid of algae, but i think it's gotten worse.. but it's not cloudy and green anymore, it's just green... It's a 50Gal Tank

Answer 4

Filthy tank,no beneficial bacteria(or just not enough),too much algae nutrition,too much light,not enough water changes. When you changed filters you removed or killed most of the bacteria that consume Ammonia,that's the main nutrient for plants(and that's algae). The algae is keeping the ammonia from killing your fish,but that won't work for very long.Start doing 10% water changes every day,don't change more than 10% at a time. Go slow or there will be a change in pH that will release more toxins and kill your fish. Until the bacteria colonies can recover(could take weeks) be very careful about ammonia. Also increase the aeration if you can.(It will help the bacteria.)

Answer 5

Its called an algal bloom.
This can occur if you have moved the tank close to sunlight, if you have recently changed the water (nitrates in tapwater feed algae), or you are overfeeding your fish and food is being left to decay.

Often a bloom may last for a week or two, then simply burn itself out. If not, proprietary chemicals can be bought from a pet shop. A natural remedy is to put a net bag stuffed with barley straw close to your filter inlet, the straw breaks down and releases an enzyme which kills the algae without harming the fish.
The algae should not harm your fish as long as you have air circulating to oxygenate the water, as algae takes oxygen out of the water.
Look out for fish gulping air at the surface, this is a sign of low oxygen content.
As I said though usually it is harmless, so don't worry.
There's worse happens at sea as they say, my problem is a local Heron taking an unhealthy interest in my goldfish pond. Out with the pond netting again.

Answer 6

You can try to test the water with the basic water testing kit. Umm... you can add some baking soda to the water to clear it up, it doesn't harm the fish. It is basically algae, scrub the sides and make sure the scum is off. Get a cup and put some baking soda and pour some water in it, mix it around and just pour it in the tank. Hopefully it would work.

Answer 7

Its called an algae bloom.

just reduce the amount of light the tank gets such as closing the windows turning off the room lights or aquarium lights

Answer 8

Sounds like an algae bloom or the gunk that you stirred up when you switched filters. Water changes, less food, less light.

Answer 9

Algea relax it is as natural as breath. there are many water treatments you can buy that will get rid of it. go to your local pet store a assistant will help you find the one most appropriate to your fish and tank type.

Answer 10

You are overfeeding your fish and, well basically its fish wee and poo thats affecting the water. Cut down and the water will clear, although theres an enzyme powder you can buy to help the process.