Too much filtration? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 17 Old 11-01-2012, 03:09 PM
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I'll just pick up on your question about position in the tank of the spray bar. [BTW, have you checked the Rena website? They might have a spraybar available separately, that could fit all models. Just a thought.]

I prefer the spray bar and any filter return below the surface. Placing the bar horizonatally across an end wall, with the holes (which should be only a single line of holes spaced apart in one continuous line, if you drill one yourself) aimed into the end wall at an angle. This with a bit of experimenting will give a flow mainly down the wall and then across the tank, but much less of a current than now, and some surface movement.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #12 of 17 Old 11-02-2012, 07:49 AM Thread Starter
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I'll just pick up on your question about position in the tank of the spray bar. [BTW, have you checked the Rena website? They might have a spraybar available separately, that could fit all models. Just a thought.]

I prefer the spray bar and any filter return below the surface. Placing the bar horizonatally across an end wall, with the holes (which should be only a single line of holes spaced apart in one continuous line, if you drill one yourself) aimed into the end wall at an angle. This with a bit of experimenting will give a flow mainly down the wall and then across the tank, but much less of a current than now, and some surface movement.

Byron.
When you say to angle the holes towards the end wall...are you talking about the wall that the spray bar is mounted to or to the other side of the aquarium? To reduce current, what if I alternated the holes on each side of the spray bar? For example, one set of holes would shoot across the tank to the far side while the other set would hit the glass where the bar is mounted? I will probably tackle this project this weekend so I am trying to get all of my information up front Thanks again.
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post #13 of 17 Old 11-03-2012, 10:28 AM Thread Starter
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Well my spray bar project ended in misery lol. The flow is just too stong for that size tank coming out of that filter. I tried holes spaced out every inch (in various sizes), every 1/2 inch, and every 1/4 inch. I tried submerging the bar as well as placing it above the surface. My tank looked like the wave pool at a water park. Is there some type of flow control for canister filters? If so, are their any downsides to using one (reduced filter life, efficency, etc.)?
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post #14 of 17 Old 11-03-2012, 11:07 AM
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For that size of tank, an appropriately rated HOB would be fine. At this point, it sounds to me like you have too much flow. As has been stated by others, these particles should be settling on the substrate at some point. HOBs are usually pretty reasonably priced. Save your current filter for that dream aquarium.

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post #15 of 17 Old 11-03-2012, 11:34 AM Thread Starter
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For that size of tank, an appropriately rated HOB would be fine. At this point, it sounds to me like you have too much flow. As has been stated by others, these particles should be settling on the substrate at some point. HOBs are usually pretty reasonably priced. Save your current filter for that dream aquarium.
My current filter is only rated for a 45 gallon tank....it is just strong. I do tend to go overboard with this stuff though....if my wife would have let me my filter would probably be larger than my current tank I took Byron's advice and went ahead and ordered the outflow kit from Rena. It comes with the spray bar and a flow reducer.
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post #16 of 17 Old 11-03-2012, 01:21 PM
I 'think' most of these impellers are magnetic induction driven and should not be negatively affected if there was back pressure resulting from a flow reduction ball valve. Then again if the flow is really too great, perhaps the filter is either over sized or does not leverage very fine media which would reduce the flow.

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post #17 of 17 Old 11-03-2012, 03:19 PM
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Others have responded before I got to this thread again, but I'll just answer your one question on directing the holes. I meant into the end wall on which the spraybar is mounted. If you angle it so that the water is hitting the wall almost perpendicular, it dissipates the flow considerably. And you want the general flow into and down the wall, not out across the tank.

I prefer the one line of holes, which is how these spraybars come from the manufacturers. I did drill additional holes in one of mine, an attempt to create a bit of surface movement opposite to the main flow into the wall. It was somewhat successful. But this was in a 4-foot tank.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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