Stupid! Double check filter connections are on.

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Nick Park

Plecostomus
MFK Member
Jul 11, 2017
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Drogheda, Ireland
I noticed my 200g was getting cloudy, so I vacuumed the gravel and started a water change. Then I realised that my FX6 wasn't returning water into the tank. Looked into the stand and realised that after my last water change (a week ago!) I hadn't turned the inlet valve back on where the hose connects to the filter. First time I've ever done this.

Thankfully, I run two filters on all my tanks, so the big cheap Chinese filter had kept the cycle from crashing. I did a quick ammonia test and readings are at zero. So I rinsed all the FX6 sponges and media in old tank water. There was no bad smell or gunge, so I'm hoping the automatic priming the FX does each day was sufficient to stop the beneficial bacteria from dying and being replaced by noxious bacteria.

The water is clearing now, and I'll be doing daily ammonia checks for the next few days. Hopefully I got away with it and my stupidity won't harm my fish. And, needless to say, I'm double checking all my filter hose connections from now on.
 
I try to run two filters on my tanks too. You just never know - human error/parts malfunction - it pays to be safe!
 
I have done this exact same thing with my FX4s. Was only half an hour tho. I just stopped closing them unless I am disconnecting it for cleaning.
 
I've done the same, but for 3 weeks and the filter was absolutely stinky when I finally noticed.
It didn't affect anything in my case as well as I had 2 more filters running and tons of plants. One of my very early lessons in fish keeping was to never run a tank on just one filter....
 
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