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Which pump for flow for shrimp tank?

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Hi,

I'm running a 100l shrimp tank, well balanced natural/Walstad tank style. Which means it has no active filter. But not too long ago I came across some Bamboo Shrimp / Wood Shrimp and they do like some flow! I introduced a little pump, photo attached.



I got this pump because it is inside the tank(no mess if it fails) and it came with a sponge, so it would not shred the young shrimp. This pump loses strength within 4-6 days, after that the sponge is full. I can keep on cleaning it, but that is not why I get the pump. I looking for the flow, not clean water ;)


Can you help me?:
  1. Do you need a sponge for shrimp to protect them from being sucked into a pump, or are they smart enough to avoid the vortex?
  2. What kind of pump/system for flow would you recommend(or do you use) and why?
  3. Do you also experience that all shrimp enjoy a little flow? (mine: CRS, CBS, Amano, Bamboo do!)
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1. Shrimp are super dumb and WILL get sucked into the filter

2. I have a pump attached to a sponge filter. This way no shrimp gets sucked in, but problem is same as yours; the sponge gets filled with waste and reduces the flow quite a bit.

3. I find bamboo shrimp definitely needs a lot of flow. Not just flow but also floating debris.
 

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Discussion Starter · #4 ·
Cheers. I will not challenge them and always will use the sponge, and I guess I'll find a way to make it work. The video might be nice, easy clean. The current pump is a lot of work to clean.

I was thinking about a dedicated setup for the bamboos with a nice landing strip of stone combined with a lot af flow 🙂 maybe even going for a biotope and recreating a Asian river bed.

Can the tank be smaller of there is more flow? The tank will hold up to Max 6 bamboos...


1. Shrimp are super dumb and WILL get sucked into the filter

2. I have a pump attached to a sponge filter. This way no shrimp gets sucked in, but problem is same as yours; the sponge gets filled with waste and reduces the flow quite a bit.

3. I find bamboo shrimp definitely needs a lot of flow. Not just flow but also floating debris.
 

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I would just take sponge out and just use it as circulation pump, it’s actually perfect size/lph for doing your ramp and bamboo shrimp. Besides you don’t want it filtering out debris, you want particles to pass through and bamboo shrimp do the filtering. The slots on housing will keep any big debris and wood shrimp from hitting impeller, if you want just roll up a small spool of fiberglass window screen as light mesh and put in there. That pump and it’s little spray bar is absolutely perfect for wood shrimp, all you have to do is get rid of sponge.
 

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Hi @DaveKS. Are you talking about the setup in the video of the one that I got(image).

In the current tank there are also baby CRS, don't you think that they will get sucket into the chopper without the sponge?
Oh, though you were just going to do the wood shrimp.

Really not much you can do but go to bigger piece of foam/mesh that won’t clog so easily. In my 7 gal which has Aquaclear 20 you can see a mesh sock I made to keep snails out of filter input tube. It’s fiberglass window screen ($5) rolled up 3 layers thick into a mesh sock that’s bigger round than input tube, about .125” gap all way around tube. It goes all way from gravel up to above water line. There is so much surface area in relation to water flow that it never clogs. You can see some large debris stuck in middle of it where filter input is, if it clogs there water flow just moves somewhere else along the 10” length of sock.

 
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