The following post found at another forum wasn't written as a joke but the punchline is good. biggrin.gif

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I have a 3 ft overflow tank in the house garden.

I have no cover as it is a half water garden aquarium.

I bought 2 goldfish couple of weekly back...
2 days ago, 1 fish was missing (morning)...no body no trace?
that nite, another is missing. again no trace.

I suspect either some neighbour stole my goldfish, or the cat took for lunch, or bird, or my filter is god damn good.

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No ammonia, no nitrite, no nitrate, no nothing because the filter has filtered your fishes away! Woohoo! happydance.gif