Spray Bar holes - Making them bigger

Discussion in 'Filters, Filtration and Pumps' started by durtydurty, 18 Aug 2008.

  1. durtydurty

    durtydurty Member

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    My spray bar holes are always getting clogged up with brown gunk and was wondering if drilling the holes bigger would solve this and whether it would have any detrimental effect's on my set up.

    Thanks :)
     
  2. Matt Holbrook-Bull

    Matt Holbrook-Bull Founder

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    yes itll work fine, but it will decrease the ferocity of the flow through them obviously. I also drill downward facing holes to send some flow down the back of the tank.. this can help reduce dead spots directly under the bar.
     
  3. durtydurty

    durtydurty Member

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    Thats cool, I guess it will prevent my vallis getting blown all over the place too!!!

    Add that to my list of things to do!
     
  4. a1Matt

    a1Matt Member

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    That is an interesting idea :idea: I will remember that for possible future use myself :)

    Hi Durty,
    If you have a lot of gunk then maybe this is saying something... maybe simpler just give all your pipes a good clean!
    I'm not meaning to criticise, just offering another angle in case that helps you.

    When I see dirt on my substrate I know to clean my filter foam. When I see cloudy water I know it is time to clean the fine filter floss. I'm not one for test kits or measurements, much prefer using those kinds of signs where I can.
     
  5. durtydurty

    durtydurty Member

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    Hi Matt,

    I cleaned them out a few weeks ago but it does build up quickly and some of holes get blocked and cause poor circulation.

    I am planning to have a good clean over the weekend.

    Thanks for the tip though.
     
  6. Wolfenrook

    Wolfenrook Member

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    I would be worried if the holes on my OUTLET were getting clogged, kind of suggests that your filter isn't doing it's job properly.

    Ade
     
  7. fourmations

    fourmations Member

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    hi all

    related question

    i have a side mounted spraybar and was wondering about drilling directional holes
    my filter is 900lph (tested) and the current holes are about 3-4 times the size of a tetratec bar holes
    to reduce velocity but still pushes a lot of water well
    but i have dead spots (150l tank)

    I cant install another external for several reasons and cant mount the bars along the length.
    Like everyone i want less equipment in the tank
    I was going to get a koralia but seeing as i have a fresh tetratec bar with small holes
    I may try the directional idea

    it currently is mounted under the water pointing upwards at the surface
    spraybar.jpg

    thanks
     
  8. Steve Smith

    Steve Smith Member

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    I would be tempted to try it just pointing horizontally and see how you get on with that. Does it push enough water to get to the opposite end of the tank?
     
  9. fourmations

    fourmations Member

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    thanks steve

    the water makes the far end no bother
    but i would be doubtful that its getting far enough along the substrate
    if you know what i mean, there are tall stems that move around a lot
    but at the base of them is fairly dead with bits of bba and poor growing low plants
    (although uneaten surface flake is driven down to the substrate fairly hard)

    perhaps the stems are just killing the flow

    i thought i had ample movement as i have tried lots of things
    but i suppose a dead spot speaks for itself

    heres the current story (this tank is 100l, new one will be 150)
    spraybar2.jpg
     
  10. Steve Smith

    Steve Smith Member

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    You could try a few things maybe. I knocked this up before reading your post correctly (re the stems) but it may work:

    [​IMG]

    You could re-arrange your sparybar to be on the left side, mirroring the abouve...

    if you have your filter inlet under the spraybar, it should help to draw the water back, creating a rotation as such. I've positioned the diffuser opposite the spraybar so that the CO2 is pushed down by the water as it's deflected. If you look at many ADA style scapes, this is very common. I've actually positioned it badly, it would probably benefit from sitting a little higher.

    It may work, but as you say, it depends on your planting etc.
     
  11. fourmations

    fourmations Member

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    cheers steve

    i have tried that method but the majority of bubbles
    got the surface way too fast, that mini filter has a glass difusser
    in the body so its chomping up the bubbles from the diffuser further

    this has boggled me for ages tbh

    my mate has a tank where the diffusers bubbles just
    go straight to the surface, yet he gets a green d/c and good growth
    mine is strategically forcibly misted and pointed at the substrate
    and stays in the water column a million times longer

    I cant understand how how he keeps a good co2 level with it
    hitting the surface so quick, i know he has a better spraybar
    arrangement along the length of the tank, but the bubbles still hit the surface within a second
    of being diffused

    regards

    4
     

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