Cloudy fish tank...we've tried everything we know of?

Your tank is way to small to house Oscars, they get to be 18 inches and are very dirty. You have 3 oscars, even though different sized, they still produce the same amount of waste. Oscars need to be housed in larger aquariums, and 3 would need 100+ gallons. Your eel depending on the type would need a larger gallon as well. As for your goldfish, the same. Goldfish need about 20 gallons each due to the amount of waste they produce. No matter how much you clean your tank, or the filtration system, your tank will always be cloudy, and eventually your fish will become sick, diseased, stunted and possibly die. Sorry.

Edit: Glad to hear about the up-grade. But your still going to run into problems. I'm not talking about your oscars now, I'm refering to your goldfish tank and having 3 in a ten gallon. Hope you plan on upgrading them as well. Right now your tank is clear, so I'm assuming that they are small. Goldfish grow very large and will become a problem just as your experiencing with your oscars. Goldfish and oscars both produce allot of waste and need exellent filtration systems and adequate housing for them. Don't think I'm trying to be rude with my comments, I'm not trying to, I'm just telling you the what I know and what I have learned. I'm not one to sugar coat and tell you to wait untill the water clears, and that everything will be alright, I'm giving you advise from experience of my own. I have had oscars and goldfish. Good luck with your new larger tank.

first off ice mountain is not filterd more than distiled water distiled water has had all of the minerals removed and is extreamly bad for fish since they need the minerals in the water you took the water into the pet store for testing but at what point was it right after a water change

and what is alright was there any ammonia or nitrite readings at all if there was then it wasn't all right

the one thing I know based on what you have said is the tank is way over stocked one oscar needs a 55 gallon tank it could be that you and the light will still promote algae growth the only thing that really fits your situation is that the tank water conditions aren't as fine as the pet store is telling you the food you are feeding even if over feeding wont cause the tank to be cloudy without causeing the ammonia level to go way up

with out knowing what brand of filters you have I am going to hope that they are ones where you can insert the carbon into the filter bag instead of useing carbon use ammionitrite it will asorb any ammonia

do 25 percent water changes everyweek while only cleaning 1/2 of the gravel every other week

this will be a better cleaning and water change program than what your doing right now

and if I am right will have the tank clearing up withen a few weeks

also instead of feeding bloodworms and krill feed them night crawlers

the best fix above all else is to get a tank better suited for the fish

Water conditioners- some may cause particulate matter to precipitate out. You feed a lot of meaty foods... you may get a bacterial bloom, the bacterial bloom should clear itself up. What I would suggest you do is to purchase a number of test kits for ammonia, nitrite, nitrate and ph. (I have those and phosphate, calcium) I started keeping an excel sheet of my aquarium stats- helps me to see trends and if I needed to post a question to a bb, I have my stats handy. What I would do is to keep stats on both tanks, perhaps the perfectly clear one as a control tank and compare the results as long as you treat them both the same. Then take your results to where I go: http://www.aquariacentral.com/forums or www.plantgeek.net and pose your question with your results. I have a 29 gallon planted tank with cloudy water on many occasions and find nothing at all wrong... I haven't found a reason for it either...

Firstly, you have overstocked your tank.

As a result, you will have cloudy water which generation is stocking density and feeds type dependent.

Try and get bigger container double your filtration medium and the screen in the sedimentation tank.

The water of an adult fish should equally not be expected to be crystal clear.

All the best

There is a product called Acurel F. It is a brown liquid that you drop in your tank. You put in 1-2 drops per gallon and within 2 or 3 hours you will see the cloudiness start to go away.

It works wonders!

was the filter sponges in the water from the tank or you will lose the beneficial bacteria which destroys and clears the murk, also the fish may play a part disturbing the bottom you could try changing the gravel or sand

AHHHHHHHHHHHHHHHHHHHHH.

3 OSCARS!?!?!?!??!?!?!?!?!?!?!?!?!?!?!?!?!?!?!

Not to be rude or anything but ONE OSCAR alone needs 55 gallons IF it is the only thing in it.

Sorry but i think you will have to get rid of the oscar before anything else