Koralia 425 - The Planted Tank Forum
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post #1 of 7 (permalink) Old 09-08-2018, 09:31 PM Thread Starter
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Koralia 425

Is a Koralia 425 too much flow for 20g long?

20G long / Finnex Planted + / Marineland C-160 / Tunze Regulator / Fluval Bubble Counter / Cobalt Neo-Therm Heater / Koralia 240 / Rhinox Drop Checker
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post #2 of 7 (permalink) Old 09-08-2018, 10:11 PM
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If that was your only means of circulation, it may work (assuming you have like a sponge filter). If you have a HOB filter, it would likely be a bit much.
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post #3 of 7 (permalink) Old 09-09-2018, 02:11 PM
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Depends on how the tank and powerhead is set up. I have a 20 long and powerhead but it is in a tall wood item to scatter the flow.
If flow is too strong, I add something to deflect or split the flow. Sometimes it is as simple as letting it shoot straight into the side of a big old sword. Other times I like to put it near the bottom, behind something and let the flow go up where it spreads out in several directions.
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post #4 of 7 (permalink) Old 09-10-2018, 12:26 AM Thread Starter
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Quote:
Originally Posted by Immortal1 View Post
If that was your only means of circulation, it may work (assuming you have like a sponge filter). If you have a HOB filter, it would likely be a bit much.
I'm currently running a canister; that's it.

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Depends on how the tank and powerhead is set up. I have a 20 long and powerhead but it is in a tall wood item to scatter the flow.
If flow is too strong, I add something to deflect or split the flow. Sometimes it is as simple as letting it shoot straight into the side of a big old sword. Other times I like to put it near the bottom, behind something and let the flow go up where it spreads out in several directions.
I'd like to put it in a corner, mainly directed at the top of tank, to keep the water agitated. I don't have room for a Spray Bar, and my Seio 320 isn't doing that good of a job....not really impressed with it.

20G long / Finnex Planted + / Marineland C-160 / Tunze Regulator / Fluval Bubble Counter / Cobalt Neo-Therm Heater / Koralia 240 / Rhinox Drop Checker
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post #5 of 7 (permalink) Old 09-10-2018, 02:26 AM
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I'm currently running a canister; that's it.



I'd like to put it in a corner, mainly directed at the top of tank, to keep the water agitated. I don't have room for a Spray Bar, and my Seio 320 isn't doing that good of a job....not really impressed with it.
So much depends on what we each have in tanks and what we may want in them. I like to have lots of places for fish to duck behind or in to hide if they feel spooked and that often means I like something like a rock or wood leaned against the side or corner. so that gets me into strapping the powerhead to the backside, pointing up or left and right to move the water different directions than just straight from the powerhead. If it runs up the back of something solid, it will often spread out in kind of a fan shaped flow that I like better than blowing all in one direction.
I'm finding some of the softer tiles like travertine that come in small (expensive!) pieces are handy for attaching things as they are easier to drill or cut and still not take up much room since they are so thin. When they have to show, I'm into gluing a bunch of plants like Java fern to cover them. Once I got Java fern and moss going, I have a pretty steady diet of trimmings to spread out to cover the uglies!
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post #6 of 7 (permalink) Old 09-10-2018, 11:06 PM
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Quote:
Originally Posted by Koenig44 View Post
I'm currently running a canister; that's it.



I'd like to put it in a corner, mainly directed at the top of tank, to keep the water agitated. I don't have room for a Spray Bar, and my Seio 320 isn't doing that good of a job....not really impressed with it.
Another option could be adding a surface skimmer, whether integrated into the canister intake or a standalone unit. This not only cleans the surface and creates some agitation, it can also create a bit of flow. I see the Eheim 350 skimmer recommended all the time.
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post #7 of 7 (permalink) Old 09-10-2018, 11:14 PM
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Yes, the 425 would be too much. Especially in a planted tank. Go with the 240. I have both the 425 and 240 in my 75G for flow/agitation and it's good for plant sway. Would be too much for a 20g
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