Got aquarium water in liquid fert container - still safe to use? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 10-02-2015, 04:30 PM Thread Starter
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Got aquarium water in liquid fert container - still safe to use?

I've been tinkering with an auto dosing setup to dose my ferts directly into my canister's output line. At first all seemed well, however after a couple days I noticed that not only were my check valves passing, but the pump rollers on my doser were installed incorrectly which allowed back siphoning. I ended up filling my dosing containers with aquarium water. I think I've got everything sorted now, however I'm unsure if the fertilizers are okay to use after they've had aquarium water sitting in them. Would there be any risk of harmful bacteria or something like that? Anyone know about this?
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post #2 of 5 (permalink) Old 10-02-2015, 07:38 PM
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Tank Water in Ferts Container

Hello cra...

I'm not exactly sure what you're trying to put together, but since there's little or no bacteria good or otherwise in tank water, I don't think you need to fret over some getting into your container of fertilizer.

Bacteria is really only able to survive on surfaces inside a cycled tank and very little if any lives in the water.


"Fear not my child, just change the tank water."
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post #3 of 5 (permalink) Old 10-02-2015, 08:25 PM
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I wouldnt be concerned about anything like bacteria from the tank water. If that was something to worry about then you'd never be able to dose ferts into an aquarium! I would however be concerned that you've no longer got the same concentration of fertilizer in your dosing containers.

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post #4 of 5 (permalink) Old 10-02-2015, 09:33 PM
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The concentration of nutrients in the bottles is usually so high that (almost) no organism will grow. If anything I would still keep the bottles away from strong light sources.

Otherwise I think the greater problem is the fact that you now have bottles with unknown concentration of nutrients. Do you happen to know how much liquid was in the bottles before water from the aquarium got in.

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post #5 of 5 (permalink) Old 10-03-2015, 12:40 AM Thread Starter
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Thanks for the input! I'm glad I can still use what I've got instead of buying more. I do have an idea of how much extra water was put in and I can adjust my dosages accordingly. The containers are not clear and they're kept in the stand so there's no issue of light.
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