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Results 1 to 9 of 9
  1. #1

    Join Date
    Feb 2013
    North Carolina

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    Thumbs down Help Please! Cloudy water, fungus, death!

    0 Not allowed!
    I set up a new 20gal tank a few weeks ago and it has been a nightmare ever since! I decided to go with a sand bottom for the first time ever and used aquarium sand from the pet store. That was a huge enough pain in the ass, but it has just gotten worse from there on out.

    20 gal tall
    Marineland 30gal HOB filter
    Pain in the butt bubble wall
    Natural rock
    Three fake plants
    Two moss balls
    3 danios
    2 gold dojo loaches
    1 apple snail
    4 julii cories
    1 mickey mouse platy


    So here's what's going on right now. ^

    I thoroughly cleaned this tank two nights ago, Sunday evening. That night, and Monday morning the water was clear. Now, Tuesday night, it looks like this. Super cloudy. I don't know why! The filter appears to be working, though I've been having problems with it. They are eating the food we give them, it's not building up on the bottom.

    Here's the story.
    Ever since I started this tank with sand in the bottom, my first time doing a sand bottom, I have had problems with my filter. I have read up on what sort of filters to use in a sand aquarium and I all I can find is conflicting information which is irritating. I have a HOB filter that I've had for several months. It use to be in my 30 gallon tank, but moved it to the 20 when I set it up and got a bigger filter for my 30 gal tank. Within days of setting up the new 20 gallon with sand, the filter started making this awful noise. It sounded like a food processor grinding away. I assumed there was sand in the impeller mechanism. I took the filter apart, cleaned it out really well, really didn't find sand in it, replaced the filter media, and reassembled it. No difference, still loud and grinding and awful sounding. The next day I bought a sponge filter cover to put over the bottom of the intake tube to help filter out sand before it got to the impeller. It worked, it quieted the filter, no more grinding, sounded good. But nothing was being filtered through the actual filter media! The sponge cover was catching all the poop and food debris, and in a couple days, no water was being sucked up into the HOB filter, and there was barely even a trickle of water coming out of it. Terrible! That was last Tuesday, Jan 29th, and so we cleaned the tank, took apart and reassembled the filter and got it all tidied up. There was a lot of food build up on the bottom at this time, and I had a hard time cleaning it all up. The apple snail produces a lot of slime in this sand-bottom tank (something it didn't use to do in the 10gal gravel bottom it was in before), and it gets really heaving with crud in it and my siphon doesn't suck it all up. Hard to clean and Frustrating! Do you recommend a different kind of siphon besides the tube kind?

    Friday, three days after I cleaned the tank all my danios (4 at the time) got fungus on their fins. At noon they were fine, by 5pm they looked like hell, 9pm was worse. I don't know why, but there was still a lot of food and poop buildup on the bottom from it being so hard to suck up when I cleaned it just days before. So I immediately treat them with Pimafix. It's what I have. The next morning they looked a little worse, and now it was spread to my platy. I continued to treat with Pimafix, and also salted the tank some.
    Come Sunday the danios were looking better, except for one which appeared to have fungus in its right gill, but no where else. When I got home from work Sunday afternoon, a blue apple snail was floating dead, leaving its yellow snail friend alone. I only had the blue one a couple weeks. The tank was just awful and I had to clean it, just 5 days after I had cleaned it before. It was bad, like I hadn't done it just days before. I did at least a 50% water change with the clean and made sure to take extra care and get every bit of left over food and poop out of the tank and clean all the decor really well. Then I fluffed the sand to make sure there wasn't any trapped air, and there wasn't. Refilled the tank, treated the water, put the decor back in, plugged up the filter, everything looked great except the danio with gill fungus. The water was crystal clear and pretty.
    Monday, danios look a lot better with fin fungus, but the one with gill fungus looked worse. Still treating with Pimafix daily, and this point included an antibiotic. The platy still had a little fungus on her, but was looking better. Monday evening the water is cloudy. What the heck? Is it from the antibiotic?
    Tuesday, the danio with gill fungus looks terrible, the fungus is huge, hasn't been eating the past two day, so I decide to quarantine to a small container on kitchen counter. Within a matter of hours she dies. The other danios in the tank look all better, back to normal with no fungus. Platy is looking a bit better too, but not all gone yet. But the water is so so cloudy murky YUCK! WHY?!!?!

    Why is this tank such a nightmare? I have a 30 gallon that I've had for years with big clown loaches and an ancient 5.5 year old tiger barb. They're fine! Never and problems! Why is this 20gallon tank awful? Is it the sand? The filter? Why are my fish sick so suddenly? Did the antibiotic (which i used one dose of) make the water all cloudy? How can I fix it? I've had fish my whole life, and have been keeping them myself all my adult life. I'm not stupid, but I'm SO lost on this one!

    UPDATE 2/6/13 Wed: I did a 50% water change and it looks maybe 50% better, but not GOOD.

  2. #2

    Join Date
    Oct 2006

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    0 Not allowed!
    For starters- did you cycle this tank? What are your tap water and tank water parameters (ammonia, nitrites, nitrates, ph.) I see you took apart the entire filter so if it was cycled, it is not now. Did you rinse the sand prior to placing it in the tank? FYI- you need not use foul langauge here, it is against the forum rules.

  3. #3

    Join Date
    Sep 2008
    EastCoast US of A

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    0 Not allowed!
    I agree with the top poster. Though it seems you've had tanks before. However, I had a huge problem with a sand bottom tank I started one little over a months ago. I did not rinse the sand as well as I should have and you couldn't even see through the water for about two weeks. However, if the water was clear and is now cloudy, it is more than likely a bacteria bloom. These occur when you accidentally kill of your good bacteria in the filter that cycling your tank would have created. Doing too vast a water change, not making sure the water going into the tank matches the tank water parameters, certain products, and too different a temperature of new water can kill off your cycle and cause a bacteria bloom. As for the fungus, when was the last time you added fish? It's possible you brought something into your tank when you brought in some new fish. In which case, get some meds for them and dose. I'd suggest 1/3 water change weekly until the bloom clears itself granted your water parameters are reading well.
    70 Gal Planted Rio Negro Angelfish Biotope with:
    1 Whip Tail Pleco
    7 Hatchet fish
    11 Glo Light tetras, 6 Black Skirted Tetras
    6 Bronze Corys
    3 Wild Type Angelfish
    Current Plants:
    Giant Amazon Sword, Narrow Leaf Java, Val, moss on driftwood

  4. #4

    Join Date
    Jan 2010
    Saskatchewan, Canada

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    0 Not allowed!
    I'm sorry if I had missed this in your post, but I am interested to know what type of sand you had used ?
    If you take your time to do the research FIRST, you can successfully set-up and keep ANY type of aquarium with ease.
    "Not using a quarantine tank is like playing Russian roulette. Nobody wins the game, some people just get to play longer than others." - Anthony Calfo
    Fishless Cycle Cycling with Fish Marine Aquarium Info [URL=""]

  5. #5

    Join Date
    Dec 2010

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    0 Not allowed!
    I am assuming this tank isn't cycled - are you testing your water parameters? What kind of test kit do you have? Your fish are showing signs of stress which brings on illness.

    Until your water parameters show your tank is cycled, there is no need to clean your filter or replace any media.

  6. #6

    Join Date
    Dec 2012

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    0 Not allowed!
    Few things that occur to me.

    I'm not familiar with this particular filter, HOBs are pretty rare here and that particular brand isn't even on the market but I do get the impression it's not capable of dealing with sandy water.
    You forget to rinse the sand.
    The tank must have started cycled since you used the filter before.

  7. #7

    Join Date
    Mar 2012
    Atlanta, GA

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    0 Not allowed!
    In cleaning your filter, you might have killed off your good bacteria.

    This probably caused your ammonia to increase, stressing your fish.

    Stressed Fish get sick, eat less, also increases ammonia.

    You treated for sick fish, which can be poisonous to invertebrates like the snails.

    The cloudy water is from bacteria in the water column increasing to feast on the ammonia.

    Recommended steps:
    1. Increase temp slowly to ~80F and continue to treat for Ich. Increasing the temp accelerates the life cycle. Rehome Apple snail, or bid him fairwell. i have personally never had one survive ich treatment. I am concerned about the corys.
    2. Vacuum sand. Ideally, you want to get all the food and poop, but you also want to get about 50% of your water while doing so... the ich lives in the bottom of the tank.
    3. Continue 50% water changes/vacuuming daily until the water stops clouding.

    In a week, everything should be back to normal. Return to weekly 25% water changes/vacuuming. If the tank is not cleared up in a week, you are missing something... something has wedged some rotting food or something under a rock or plant and is not getting vacuumed up.

  8. #8

    Join Date
    Mar 2012
    Gainesville, VA

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    0 Not allowed!
    +1 to Cliff's question. I'm curious to know what kind of sand you actually used. Some sand is made for FW aquariums, while others are used for SW. Some sand can increase pH or gH/kH. Some won't. What kind did you buy?

    As for the sand clouding up the water? If you didn't notice in the first week, then it's probably not the sand. It looks more like a bacterial bloom, which can occur if your tank isn't cycled, or you didn't have enough beneficial bacteria to keep up with your bio-load/live stock. I'm betting on #2.

    Quick question: If the tank looked so bad after a few days, why didn't you just clean it again?
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  9. #9

    Join Date
    Nov 2010
    ambler, PA

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    0 Not allowed!
    Agree to the above posts, Failed/non-existent cycle looks to be the problem. I use HOB filters, one on my 10g sand-bottom tank and used to have these type of issues before I understood that thoroughly "cleaning" the filter is one of the worst things you can do. The sand was not the problem in my case. Post your water parameters, the fact that none are present in your original post is rather concerning.

    Also, was the blue floating apple snail hanging out of its shell? If the "door" was shut it was still alive, mine used to frequently float around for a day or two then land and be fine.

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