Chewyrat77 Posted March 3, 2021 Share Posted March 3, 2021 I've seen suggestions of putting a spray bar in or placing an intake sponge filter over the outputs on an fx4. What do you guys think of placing a piece of sponge or coarse filter pad inside of the output nozzle to reduce the flow? Link to comment Share on other sites More sharing options...
Yanni Posted March 3, 2021 Share Posted March 3, 2021 I think putting it inside the nozzle would cause a problem sooner or later. The pump might not work as well if you put the sponge there. I would try to maybe put something like a decoration in front of the output in order to disperse the flow. You could try to put a sponge or coarse filter pad in the output but there might be a problem with the sponge or filter pad staying in the output. Link to comment Share on other sites More sharing options...
MN-AQUARIST Posted March 3, 2021 Share Posted March 3, 2021 So what I have done is taken off the directional caps, which helped reduce the velocity of the flow and then I also slightly restricted the output flow with the shut off valve, makes a huge difference for me. Link to comment Share on other sites More sharing options...
MickS77 Posted March 3, 2021 Share Posted March 3, 2021 I'd build a spray bar, its pretty easy. I made one for my Ehiem canister. 1 Link to comment Share on other sites More sharing options...
Chrisdis Posted March 4, 2021 Share Posted March 4, 2021 I've been running my fx4 with pre filters on the intake and output for about a year now. Cuts the harsh flow to almost nothing. My betta swims around the sponge and picks stuff off of it. I put an amp clamp on the motor and no increased amperage with the sponges on. Link to comment Share on other sites More sharing options...
PatrickB Posted March 4, 2021 Share Posted March 4, 2021 Since it's not really intuitive, I'll mention it here that reducing a pump's flow actually reduces it's power draw and load, not the other way around. Don't worry about using restrictions to reduce flow on your filters, it won't damage them. Link to comment Share on other sites More sharing options...
Medkow74 Posted March 4, 2021 Share Posted March 4, 2021 1 hour ago, PatrickB said: Since it's not really intuitive, I'll mention it here that reducing a pump's flow actually reduces it's power draw and load, not the other way around. Don't worry about using restrictions to reduce flow on your filters, it won't damage them. It may reduce the velocity of the water coming out of the outlets but it won't reduce the pumps flow. With out slowing the motor down it's still trying to pump as much as it did before. So in theory you could cause restriction which could over amp the motor. Link to comment Share on other sites More sharing options...
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