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Old 07-22-2014, 08:54 PM   #1
eadavis80
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Default Aquarium pump suggestions

I had some diffusion stone issues, but it seems to be working OKAY now, however, the stone is still not producing a lot of bubbles. I am reading that smaller/mist bubbles are better, but it's not producing that many. To conduct an experiment, I tried a different aquarium pump to my diffusion stone and it produced NOTHING even though it powers my 30 gallon fish tank just fine. So, my question is, for those of you that aerate wort with a diffusion stone and aquarium pump - NOT straight oxygen from an O2 tank - which type of aquarium pump do you use? My setup is something I'm borrowing from a friend, and the pump might be really old, however, 3 months ago it did create enough aeration to result in overflowing foam from my primary! But, since then it's been very modest in its output. I have boiled the stone and when I hooked the stone straight to an O2 tank at my local home brew store, it did produce bubbles, so I think it's just a matter of upping its power supply (thus the question of which fish tank pumps do you suggest).

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Old 07-22-2014, 10:23 PM   #2
schoellhorn82
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You may want to try boiling to stone for longer.. When i used to use a pump that happened to me a few times and cleaned it right out. I used to use one of the blue ones that you buy from northern brewer but i think they sell them at walmart to in the fish section. I actually dont aerate any more other than splashing the wort around a bit. I've found it to be a waste of time as long as my yeast pitching is correct. I've done side by side comparisons of using aerated wort with O2 and just what i do. The end product is always the same for me.

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Old 07-23-2014, 11:39 AM   #3
eadavis80
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Yeah, I'm starting to doubt if the aquarium pump thing is really worth it. I have a double strainer I pour my wort through which creates a lot of foam as it goes into the primary. So, between that strainer and just rocking the primary back and forth for a few minutes, it's probably creating the same amount of O2 in my wort as the aquarium pump does. It's just weird that my current aquarium pump creates NO bubbles from my diffusion stone, but the other pump creates a modest amount. I guess I'll try one more batch with the aquarium pump setup and see if it creates ample foam. If not, I'll either say screw it and rely on the strainer/shaking or down the road invest in a pure O2 tank. You don't do that do you? If so, have you noticed a big difference? I only have a plastic bucket and the last few batches have started airlock bubbling at about 20 hours. I'd like to get that down to 10-12, but just because I don't see airlock activity for 20 hours doesn't necessarily mean fermentation hasn't begun well before that, I suppose.

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