Does gals matter when it comes to air pumps?
By - Longjumping-Moose-24
Check out putting powerhead on sponge filters. Makes sponge mechanical and biological filters and also silent since there's no bubbles or air pump making noise
Yes it does. It impacts the flow rate and water turnover of your tank. You should shoot for a pump that can turn over at least 4x your tank volume per hour.
Do you (or anyone reading this) have a recommendation for a air pump suitable for this size of a tank? Most I seen go up to 75gal
Sorry I don’t use sponge filters, but you could just get two?
There are two parameters to check (ignore the gallons), as in most pneumatic applications, flow rate and pressure. Flow rate limiting the number of appliances and their size.
Pressure how hard they can work.
In a fishtank the flow rate yells you how many airstones, filters or airlift pipes you can run of a pump (yes, I know this is very generalised the amount of bubbles will vary too). The pressure will mostly impact how deep the outlets can be in the water.
As an example I have two double pumps, same flow rate, one I stuck on a 15g tank (18mpa) the other is powering the ug in my 90g (50mpa). Unfortunately pressure isn't advertised that much and even some shops don't have an understanding why a pump will not work on a specific tank.
Depends on how you’re using the sponge filters and how many you’re putting in there. Are they just to supplement the canister filter and provide some air bubbles? If so you’re fine. If not you’re going to need a bunch of them, and you’ll want to size them to to sponge filters. Like, the large size ones from Aquarium Co-op are for 40 gallons or so, so you’d want to have 4-6 of those in there, likely each with its own air pump depending on how powerful your pumps are. What are you going to stock in there? You could get away with fewer if you’re doing a Walstead method tank and keep it lightly stocked with lots of plants.
I use a usb one just to provide enough air bubbles to break surface tension and cycle the O2/CO2 in my 40gallon tank. That’s in addition to my canister filter that handles 80 gallons. The size only comes into play when you’re talking about filtration (other than noise, or over-doing it in a small tank).
I was thinking a hang on back since some have the capacity for 110 gal, but add on 3 50gal sponge filters. (I been told its hard to over filter a tank) I kept reading reviews of canister filters breaking and overflowing and flooding the floor.. kind of scared me away. I do have plenty of aquarium plants and its for my 4 goldfish! I wanted to upgrade them so I can see them grow to their full potential and obviously id like to throw in another one or two in there but I haven't seen any air pumps that go up to 120 gals yet online so idk what to do
I think 4 goldfish is about max for a 120 gallon tank. Add in a dojo loach or two if you want some variety. I’d *highly* recommend investing in a canister filter, especially for goldfish. I don’t think they’re quite as prone to failure as you’re making them out to be. Completely anecdotal but I’ve had a couple of PennPlax and a Fluval and have had zero issues with any of them. You could also just invest in a moisture/water leak alarm to help put you at ease.
I’ve never had a hang on back one that large. My first thought would be how loud it was, and second that it might not give you enough flow. You’ll want 5-6 gallons per hour (6 is better). So for your 120 gallon you’ll want to get between 600-720gallons/hour. To get that much, you really might as well get a canister filter (or set up a sump) that will keep the tank much cleaner and the water balanced longer for those goldfish.
I don't have anything large like comets, I heard its usually 20 gal per goldfish, but I don't want to push that rule to its full extent since filtration is more important to me. Before I just used the 10gal per fish rule and its really making me work hard to keep good parameters lol I have a friend who has like 20 tanks and shes emphasized how much she loves canisters to me! I'm tempted but im scared to be that unlucky one aha since it'll go in my carpeted bedroom, I didn't know there are water leak alarms so maybe I'll look into it before investing in a expensive hang on back. I never had a tank to this size so I been unsure how to go about filters
With goldfish it’s usually 30g for the first, 20 for each additional. But it also depends on the species. You could put one more in there and probably be okay. Dojo loaches are pretty cool though too and they get long.
And keep in mind if you stock it to the max, you’re looking at weekly water changes. If not, and you had a good canister filter, you could probably squeeze by with once every 2-3 weeks. And that’s definitely something to keep in mind when you’re changing out that much water.