Greenish / Cloudy Water / Substrate

drdream

AC Members
Dec 7, 2003
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Boston
Hello, ive read many post regarding this issue. Its always states algae as the culprit. A little history:

This 75 Gallon tank was set up in another apt (2 blocks away).. The water was crystal clear at all times, algae would grow only after neglected water changes and extended lighting periods.

When i moved, i didnt set up the tank for 3 days, i later found out that most of the beneficial bacteria probably died and so the tank needed to cycle all over again.. After a few days the water was getting increasingly cloudy, so cloudy that you could not see the back of the tank. It was the whitish / milky cloudy. I assumed this was the cycle and let it go on. for about 3 weeks, finally i called the local pet-co and was told maybe i need to change the filter carbon, i went and bought more.. this did not solve the problem.. Finally i bought "Accu-Clear" water clearer.. It cleared the water to pristine quality in about an hour. I thought my problems were over, but slowly but surely it gets cloudy to the point of 0 visibility.

When doing the most recent gravel vacuum / water change, i noticed severe green layers on the substrate, and heavily inside the filter mesh. I rinsed all this away, did a 50% water change, completely vacuumed the gravel, and still no clear water. I then bought new filter carbon from fluval instead of 3rd party carbon. Did another water change, and still cloudy / merky / green water and filter media.

I feel ive tried everything, this tank was up for about 2 years in my other apt without any problems. :confused:

a few statistics:
Water temperature heated to constant 80F
Aquarium is near a window, but with blinds shut all the time.
Tank Light uses a dusk / dawn outdoor timer. On at dusk, off at dawn
I dont believe this to be an algae problem for the following reasons:
1) algae tends to grow on surfaces like the glass and ornaments before clouding the water.. No such algae exist
2) the tank light was left off for two weeks (bulb blew) still green . .
3) Fish are fed once every four days.
4) Tank was on the same light cycle and had much more direct sunlight in my other apt.
Tank has 7 fish for 75 gallons

Despite these problems, no fish have died (except for when the tank recycled killing many fishies :sad
I should also note that this is a rear facing window that gets little sunlight anyway, and the blinds are always shut. You would not know it was daytime unless you looked out the window.

please help
 
I'd get your water tested at a LFS. Bring a sample of your tap water as well as a sample from your tank. Have them both tested for ammonia, nitrate, pH, hardness, and for other elements such as iron.

You would not believe the difference the quality of tap water makes. I used to live in an apt where water was very hard with a lot of lime and iron in it. My plants would have slow growth and I was practically scraping algae every other day. I've recently moved to another apt, where water is soft, but not treated with water softener. My plants are now thriving and growing like weeds and I no longer have to scrape as much algae.

Best of luck to you.
 
Thanks for responding. The difference between this place is that this is a condo and the other place was an apt. This place has a water heater built in whereas the other place probably has shared water. I dont know about my testing skills because it seems that the tank water is exactly the same as tap water.

Tank:
P.H. - 7.6
Ammonia - 0.0 PPM
GH - 90PPM
Nitrite - 0.0 PPM

Tap:
P.H. - 7.6
Ammonia 0.0 PPM
GH - 90 PPM
Nitrite - 0.0 PPM

These are all the test i can run with the kit i have. The general hardness test is difficult because it says "stop when the water turns green" and as you add each drop (of the green liquid) the water turnes one shade darker of green.. so what green do they mean? The 90PPM result was from no hint of yellow, as all the drops yeilded green..

Weve been hit with some serious snow here in boston so i cannot make it to the petco, i will take my tap water and tank water there for sampling and post the results. thanks again..
 
This may sound like a dumb question, but I can't tell from your posts... is the water a green cloudy color or white cloudy color. White cloudy water would indicate a different problem.

Also, what additives do you use - any dechlorinators, pH adjusters, vitamins, anything like that?

Jim
 
The water is definately green, as i stated above, the filter mesh is/was completely green, the water color is a light pastel like green while the filter mesh has a darker navy green. Also green substance on substrate when vacuuming..

However there is no algae on the glass, or any surfaces and again, i do not believe this to be algae.

The tank overall has a greenish tint everythings green!!
Im on my way to the pet store now
 
Green water is a unicellular, floating algae. It can (and often does) occur even if you're not growing mats of algae elsewhere in the tank.

Green water can be cured by either reducing nutrients (e.g., nitrates, phosphates, etc.) in the water column and/or by decreasing light. Some people have had success with a total tank blackout for 2-3 days. Nutrients can be reduced by feeding less often and/or doing water changes; sounds like you've been doing that already. Do you use any sort of pH adjuster like ProperPH? It's loaded with phosphates, which is wonderful for unicellular algae.

If all else fails, you can always get a UV unit, but that's rarely necessary.

Good luck,
Jim
 
I appreciate your help, ive tried to be as clear as i can.. I have not been using any chemicals or water treatment products except for Water Conditioner when changing water, and Accu-Clear water clearer.

The tank light was out for two weeks because the bulb blew. In that two weeks of tank darkness there was no change in the density of the cloudy water.

Even after cleaning the tank, substrate, and filter the water returns to cloudy within 24-48 hours. Accuclear worked for a while but dosent seem to be working anymore.

I also recall some reddish brown stuff when vaccuming but i could be imagining that.

Here is a photo, its hard to tell from the photo but the water is a light green color.
tank1.jpg
 
How often do you do water changes, and what size are they? Accu-Clear should not be used--it's adding chemicals to your water, and not helping, so toss it. If you can, I would get a quart of water from a healthy planted tank, and maybe consider adding some low light plants like java ferns or anubias. The plants will compete with the free-floating algae for nutrients.
 
I do 25% water changes once per month.. I just came back from the petco, they told me they had a woman with the same problem with a water heater. I just moved into this new place and it has its own water heater.. they said maybe there could be too much iron in the water but i have no test for this.

I bought more acu-rel-f (arrgg).. surprisingly it cleared up the water to about 90% visibility.. so now im just waiting to see if it clouds back up again. Also i should note (as i slap myself on the head) that this temporary regular flourescent light i bought (from hardware store) gives off a greenish afterglow. I will switch back to plant flourescent lights.

Latest petco test:

Aquarium
PH. 7.6
GH "soft"
Ammonia: 0
Nitrites / Nitrates: 0

Tap:
PH. 8.4??
GH "soft"
Ammonia: 0
 
Hmmm... I've never heard of a water heater causing algae blooms. I suspect your Petco help doesn't of what he/she speaks.

You note that your tap water tests at zero nitrites and nitrates. Did they conduct two separate tests to discover that? It would be unusual for a cycled tank to have no nitrates, unless you've got so much algae that it's scavenging all available nitrogen. That seems unlikely to me.

It would be nice if the stuff you added permanently clears the water, but I'd be pretty surprised if it did. Usually it just causes the stuff in the water to clump and settle, only to be replaced by a new bloom.

I'd be inclined to try daily water changes of 25% coupled with a total blackout for 2-3 days (blanket over the tank, the works) and see if that helps.

Keep us posted...

Jim
 
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