Question:I just got a 5.5 gal goldfish starter tank, and one of the things that came with it was an Elite Stingray 5 submersible filter. Does the whole thing go underwater? or do you keep the thingy moving water out of the top out of the water, to oxygenate the water with a waterfall? no aerator came with the kit (none mentioned on the box), so I was wondering if this was supposed to serve a dual purpose. Only the filter was in there, no box or instructions for just the filter. Also, how often should I change the filter cartridges? Don't say anything about being too stupid to own a fish, because at least I'm asking, and I bet all of you had lots of questions with your first couple of tanks! Thanks, sorry about the rant, people always post things about people not being responsible enough or not deserving to have fish.
Answers:
You don't want to have it so high out of the water that it makes a waterfall - this puts more strain on the motor. Just put it in so the top is just below the water surface and so that it creates surface movement (ripples) across the top of the water - this provides the greatest O2/CO2 exchange and least strain for the motor.
As far as changing cartridges - that will depend on your feeding habits and number/type of fish. In general, rinsing the filter media once a week (in a separate container with tank water, not tap water because this contains chlorine and will kill the beneficial bacteria on the pads) is enough. I reuse all my media until it starts to fall apart.
Thie filter is to go under water! I have one. I change the filters about every couple of months. But i also oly have 2 cory cats and 3 ottocinclus, along with a few tetras. You might have to change it alot more due to you haveing goldfish. Just go and buy an areator. They dont cost much. But i hate to tell you this, 5.5 gallons isnt enough for goldfish. I have no idea why they sell them. Because the goldfish will out grow that , quick!
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