What is Reddit's opinion of Hydor Koralia Nano Aquarium Circulation Pump, Includes Built-In Cable Protector, 240 GPH, Measures 2.4-Inches & is Ideal for Fresh or Salt Water Use?

From 3.5 billion Reddit comments

Honestly if you're looking for cheap two of these 425g/hr would probably do it. I've run these for quite a while. However you should def plan to upgrade.

https://www.amazon.com/Hydor-Koralia-Nano-Aquarium-Circulation/dp/B0036S4YZ0 two of the smaller 240gph pumps would be great. Down the road you can add a third if needed.

If you have money to burn, you can buy two AI Nero 3s. They are controllable from 200-2000 GPH and have wifi apps. You could create surge flows or a standing oscillating wave.

So you’ll need some kind of circulation - when I set up my second tank, I didn’t have any and started to get some algae. As soon as I installed a nano circulation pump, that cleared up.

I also made the mistake of buying very cheap power heads or filters which did not last at all. Wish I had just spent more from the beginning. You want something that moves the water but does not break the surface. Diana Walstad recommends a power head with QuickFilter attachment. I am a fan of the circulation pump.

Edit: this is what I have

How to vacuum/clean the gravel of a heavily planted tank, like a carpet or really thick bush? I was thinking of using a circulation pump to kick up any debris into the water column. Was curious if anyone here had any input.

I have a 45 gallon. This is what I run. Its strong enough that it can blow co2 across my tank. Anything thats about 200gph will do. I create a circulars flow across my tank by aiming it a downward angel

https://www.amazon.com/dp/B0036S4YZ0/ref=cm_sw_r_sms_c_api_i_rVpsCbGV3DVGK

Something like a Koralia Nano 250 might do the trick for a tank that size.

There are two ways of getting CO2. One is fully dissolving it with something called a "in line" diffuser. It injects CO2 on the outtake side of the pump. What you have is an external diffuser, so your CO2 will need to be spread by the physical bubbles coming in contact with the plant leaves. If the bubbles just rise to the top they wont fully dissolve and you'll waste a lot of co2.

Don't put it directly under the filter, it will eat away your filters impeller. Should be at your exhaust so the bubbles are pushed around. CO2 forms carbonic acid which is acidic

Yes put it at the opposite side. You would actually get a false reading putting it to close, dont worry about it!

Maybe consider a Hydor for some flow

Thanks for the suggestion! I had been eyeing this for a while, but wasnt so sure about the circulation issue. Do you think that is a good choice? Also, I have my drop checker on the opposite side of the aquarium from my co2 diffused and it is always green, though turns yellow when the lights are off. Should I still try to up the CO2 even if it is green?

I was eyeing this for a while so maybe ill pick it up. Not sure if the 240 gph would be too much so maybe ill test it out. Thanks for the help!

This is the one i use

https://www.amazon.com/dp/B0036S4YZ0/ref=cm_sw_r_awd_KFBkvb07NSX27

It does a great job. A little pricey compared to some of the more powerful ones. If you are worried about things getting chopped up in, just stretch some pantyhose around it.

Do you think something like a nano Hydor Koralia Circulation and Wave Pump would be even better? It doesn't suck water but only pushes water with a rotor.

I can't speak to the compatibility but maybe try one of these to catch him...

I got this for my nano Hydor Koralia Nano 240 Aquarium Circulation Pump, 240 GPH https://www.amazon.com/dp/B0036S4YZ0/ref=cm_sw_r_cp_api_i_EhXSDbCSYA6PG

To start with, a canister and a sump together are overkill for a tank that size. Overkill isn't really a bad thing when it comes to filtration.

Your diagram makes sense, and your plan seems fine. If you haven't yet, check out this post about sumps in general, but it seems to me like you have the concepts in hand.

I'm guessing that you mean surface skimmer/overflow in your diagram where you have "skimmer/intake" listed. Freshwater does not need protein skimmers, they don't work in any way as effectively as in saltwater.

You don't need to hook the return (what you call outflow) to another powerhead, you can just use a U-pipe to flow into the tank.

What you'll want instead of another powerhead, if you find you want more flow, is a circulation pump or two to move your water around.

Let me know if I misunderstood you or if you have any more questions

Hydor Koralia nano 240