twinkles Posted June 20, 2009 Report Share Posted June 20, 2009 I picked up a new tank dirt cheap the other day, with a stand and hood. It came with a powerhead (1600L/h) and in the hood theres a compartment with a spray bar for it to connect to, which sprays onto a tray of noodles and filter wool. Then at the end of the compartment there was just a round hole for the water to fall back into the tank. I didn't like the look of it so i blocked up the hole and drilled little holes all through the bottom of the compartment, so it should drip out like a trickle thing. Question is how many holes should i need to let the water flow? I want it reasonably slow trickling, and don't want to slow the filter down (would not enough do that?) but i don't want to have too many holes so it only drips. Is there any easy way to work it out or do I have to just keep drilling and testing it? I know nothing about these hood filter thingies, i just had to guess at how it works, and i suspect the tray itself is a replacement because it doesn't quite fit and the holes dont line up. Quote Link to comment Share on other sites More sharing options...
oeminx Posted June 20, 2009 Report Share Posted June 20, 2009 Not enough holes will not slow the pump down, it will just flood the filter box. If the box is not being flooded then you have enough holes. As a general rule you should match the same area of drilled hole to the area of the hole you blocked. Quote Link to comment Share on other sites More sharing options...
twinkles Posted June 20, 2009 Author Report Share Posted June 20, 2009 does it matter what size the holes are each? I mean, if they are small will it comes out as a spray, or will it just flood the box? Or if they are big will it only come out the easiest ones? Lol you can see i have no idea, i haven't seen what one of these looks like. Quote Link to comment Share on other sites More sharing options...
si_sphinx Posted June 20, 2009 Report Share Posted June 20, 2009 Mine has holes in the side instead of the bottom and the water come out forwards in an arc and aerates the water at the same time. works really well. Just keep drilling holes until you get the right amount or flow, Thats what i would do Quote Link to comment Share on other sites More sharing options...
twinkles Posted June 21, 2009 Author Report Share Posted June 21, 2009 lol i guess i'll have to just frustrating, i have to wait a week for the silicon to dry before i can test it out why can't it dry instantly grrr Quote Link to comment Share on other sites More sharing options...
oeminx Posted June 21, 2009 Report Share Posted June 21, 2009 I think 2-3mm holes are a good choice. The smaller they are the easier that are to clog up. Quote Link to comment Share on other sites More sharing options...
ryanjury Posted June 21, 2009 Report Share Posted June 21, 2009 If you are going to modify it, make sure you add some emergency holes somewhere near the top so if your normal holes do clog then your hood wont overflow onto your floor.. Quote Link to comment Share on other sites More sharing options...
twinkles Posted June 21, 2009 Author Report Share Posted June 21, 2009 good thinking, i'll do some 'overflow' holes too Quote Link to comment Share on other sites More sharing options...
spoon Posted June 21, 2009 Report Share Posted June 21, 2009 i have a r338 that has a similar filter it has holes drilled along the front in a spray bar arrangement until i drilled holes all the way round the bottom edge then stuck a course piece of filter foam over them so it was just resting in the water . result was no loss of lph to the filter but no turbulance (tank was divided for 2 male fighters) Quote Link to comment Share on other sites More sharing options...
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