Could ONE Goldfish cause cloudy water.....

Z7What

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I have a overstocked/overfiltered 10G with a AC30 filter. The filter is upgraded with a AC50 impeller and "hot-rodded". Its been running like this for a little over a year. The tank has always been super clean with crystal clear water. 2-2.5 months ago our son won a goldfish from a local fair that made its way into the tank. Shortly(2-3weeks) I started to notice that the water was slightly cloudy with a slight tanned color to it. Since then I have tried everything I could think of to fix this issue. I added more biomedia(Matrix) thinking it could be a bloom of something, replaced 1 of the 2 layers of bonded filter floss that was in the filter with a new piece. Larger WCs, normally I do 25-30%, so I started doing 40-50% WCs. This helped but for only about a day. Nothing seamed to help the cloudyness or the slight tanned color. Last week I thought I would try using carbon to remove the tanned color and I'm happy to say that it did infact fix that issue, but I still have cloudy water. I should state that its not now or ever was super cloudy, just not crystal like it used to be.

I know this is going to be asked so....
pH-7.51
Ammonia - 0
Nitrite - 0
Nitrate - WCs done when it gets to 40ish
Light - White LEDs that run 4-6hrs a day, sometimes if we fall asleep before turning it off it will stay on for as much as 12hrs, but this isn't often.

I was told in a FB Fish Keeping page, that the Goldfish is 100% the cause of my cloudiness. I know Goldfish are very dirty fish, but even if it was the cause of the cloudy water, would it really take 2-3 weeks to make it cloudy?

Yesterday I decided to take the Goldfish out the tank. Our 5.5yr old wasn't happy at all about this decision but I felt that it needed to happen. The good thing is our neighbor across the street has a inground plastic pond that currently has Goldfish in it, so I put it in there, so my son can walk across the street anytime and check on his Goldfish. After removing the Goldfish I did a 50% WC, today its was still cloudy.

Thoughts? Ideas?

Hopfully we won't have this 10G much longer. We recently sold our home before finding a new one, so we are currently living with my Mother-In-Law. I have a brand new 75G in storage that will be set up asap once we find a new house.

Heres a picture showing this cloudiness, this was before I added the carbon which is why it has a tanned color to it.
Cloudy.jpeg

Wayne
 

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Goldfish love to play with substrate. So do cories, but they don't make as much of a mess as goldfish. I would think that the contents of the substrate (both sand and an increased amount of fish poop) might have at least a little bit to do with it. Goldfish pooped more, poop settled on top of the substrate, goldfish kicked up microscopic bits of poop and sand. Did you rinse the sand until it ran clear before you added it to the tank?

Very good choice to move the goldfish to a pond! It might take more than a few days (and a few large water changes) before that water clears up again, if it was due to the goldfish.
 
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Goldfish love to play with substrate. So do cories, but they don't make as much of a mess as goldfish. I would think that the contents of the substrate (both sand and an increased amount of fish poop) might have at least a little bit to do with it. Goldfish pooped more, poop settled on top of the substrate, goldfish kicked up microscopic bits of poop and sand. Did you rinse the sand until it ran clear before you added it to the tank?

Very good choice to move the goldfish to a pond! It might take more than a few days (and a few large water changes) before that water clears up again, if it was due to the goldfish.

The sand has been in the tank for 10+ months but yes I did rinse it until it was clear. Its funny you mention that, the tank was clearer the day I put the sand in it than it is now. I'm hoping the removal of the Goldfish clears it up.

Thanks for the info, ill try and get a few extra lower percentage WCs in over the next week or so to see if that helps it.

Wayne
 
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I'm happy to say that moving the Goldfish to the neighbors pond has helped my tank get back to normal. Checked on it in the pond yesterday and hes enjoy his new place and is getting along great with the other fish.
 
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