Strange issue

[bluehawk]

My 55 gallon community tank gets vacuumed and 40% water change weekly. It is beautifully clear and water tests perfect every time. It is hard and pH is 7.6 ammonia, nitrites and nitrates are excellent and fish are healthy. 5 angels, 2 dwarf gouramis, 2 balloon rams, small pleco, 3 platys and 5 quarter size snails. I have a HOB 30 -60 filter on back and a cascade 1000 canister. Here's the problem. About 72 hours after water change the tank stinks for about 24 hours and then goes back to normal with no odor. Any ideas?

 

[Yorg]

My 55 gallon community tank gets vacuumed and 40% water change weekly. It is beautifully clear and water tests perfect every time. It is hard and pH is 7.6 ammonia, nitrites and nitrates are excellent and fish are healthy. 5 angels, 2 dwarf gouramis, 2 balloon rams, small pleco, 3 platys and 5 quarter size snails. I have a HOB 30 -60 filter on back and a cascade 1000 canister. Here's the problem. About 72 hours after water change the tank stinks for about 24 hours and then goes back to normal with no odor. Any ideas?

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Hi bluehawk: Have you tested the parameters of your tap water? Does it have an odor as well?

 

[bluehawk]

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Hi bluehawk: Have you tested the parameters of your tap water? Does it have an odor as well?

Tap water is fine with no odor.

 

[Yorg]

Tap water is fine with no odor.

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Do you use any additives at water change (dechlorinator, bacterial additives, etc.)?

 

[bluehawk]

Sachet prime

 

[bluehawk]

Seachem prime

 

[TMaier]

Seachem prime

Yep it stinks. But only for a few minutes when mixing. But I am using the min recommended amount. I could imagine it would be strong if using max or higher.

 

[Yorg]

Seachem prime

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Good choice! Have you inspected your filter media recently to see if anything looks unusual (build-up of organic matter, etc.)?

If the filter is okay and everything else looks good, the only thing I can think of to try would be running some activated carbon to see if it controls the odor.

 

[flchamp89]

Thats a heavy bioload. Parameters are good? Tds?

 

[Autumnsky]

Have you tested the water during the time it stinks, any differences???

Do you rinse the media with untreated tap water?