Minnow / Blenny Doser Tubing Adapter?

[Bryman]

Hi All,
Although it's nice that the provided tubing is small for the Minnow and Blenny, I am running into some challenges trying to get it to work with dosing containers. I can't seem to find bulkheads or adapters to cleanly go from the provided PVC Tubing Size (IDxOD): 3 x 5mm to something more standard in USA like 1/4" push-connect fittings. The reason I want to do this is to DIY some caps of provided Modern Reef RKS containers with bulkheads with rigid 1/4" tubing going to the bottom of the containers, and on top connecting to the flexible Minnow tubing. Has anyone done this successfully or found a method that's air-tight and works?

 

[JeffB418]

I’ve used these together to adapter the blenny hose to my ice cap dosing containers that use push fit 1/4”

This push fit into my dosing container.

https://a.co/d/esm78Rm

Which goes from 1/4” to 3/16”

Then use 3/16” ID tubing (use short piece)

https://a.co/d/cnsQowz

Then finally these barb adapters from 3/16” to 1/8” to adapt to the dosing tubing provided.

https://a.co/d/da3Hgu1

Unfortunately they don’t make a direct 1/4” push to 1/8” barb. So ya gotta piece wise it.

Make sure to keep the tubing between the push connect and barb short as possible, it helps with crimping and leaks.

 

[JeffB418]

Other option is to use these 2 together. You’ll need some teflon pipe tape or similar to make sure the seal is good.

https://a.co/d/857P4vm

https://a.co/d/cugFQH0

 

[Bryman]

Other option is to use these 2 together. You’ll need some teflon pipe tape or similar to make sure the seal is good.

https://a.co/d/857P4vm

https://a.co/d/cugFQH0

I am going to try these two along with this 1/4" rigid tubing that is compatible with push-connects to go to the bottom of the containers.

Rigid RODI Tubing

This hard 1/4" tubing that is 100% airtight with John Guest style push to connect fittings, it does not bend so is useful for situations when you need to make a perfectly straight run. It is sold in 18" lengths and if you need a longer section it can be joined together simply with a John...

www.avastmarine.com

 

[Munaz]

Hi All,
Although it's nice that the provided tubing is small for the Minnow and Blenny, I am running into some challenges trying to get it to work with dosing containers. I can't seem to find bulkheads or adapters to cleanly go from the provided PVC Tubing Size (IDxOD): 3 x 5mm to something more standard in USA like 1/4" push-connect fittings. The reason I want to do this is to DIY some caps of provided Modern Reef RKS containers with bulkheads with rigid 1/4" tubing going to the bottom of the containers, and on top connecting to the flexible Minnow tubing. Has anyone done this successfully or found a method that's air-tight and works?

I’ve done something similar and the stepped adapter approach is basically the cleanest option right now. There’s no true 1/4 push-connect to 3x5 mm solution, so chaining down with short sections works fine if everything is tight. Keeping the reducer sections as short as possible and using rigid 1/4 tubing inside the container really helps with siphoning and leaks. Once it’s seated properly, it’s been airtight and reliable for me.