grizfyrfyter
Guest
N 400 only takes about 24 hrs to fully harden. Doesn't need to be soaked in freshwater to "cure" like Portland cement does. It's safe to go in tank.
Frag plugs
- Thread starter grizfyrfyter
- Start date
OurCoralReef
Guest
You said concrete so i assumed regular concrete not n400
Thank you i appreciate your time and effort
grizfyrfyter
Guest
That being said, if I do keep making these, I will switch to white or Portland cement and soak it in rodi for a few weeks. N400 is about $50 a bag and is a pain in the ass to get (I went through my buddies business). Portland cement is only about $8 for the same amount and is a lot easier to work with for this purpose.
grizfyrfyter
Guest
I did say concrete, which N400 is not. My mistake.
Its just a thick cement powder that can cure underwater and doesn't have any toxins.
OurCoralReef
Guest
Right so do you cure the concrete in fresh water for a couple days or just directly into your tank
grizfyrfyter
Guest
Portland cement and white cement need to be soaked in freshwater or it will affect ph in a reef tank.
N 400 doesn't need to soak, it's fine to go straight in. It's commonly used for aquascaping rocks together.
OurCoralReef
Guest
Oh ok got you
So used the wrong word you really just meant n400 and not concrete
grizfyrfyter
Guest
Yeah, that's the problem. Cement is a vague product term. All 3 are cement.
N 400 is just one of a bunch of specialty formula cements that MasterEmaco makes.
OurCoralReef
Guest
Did you try adding some agronite sand to the n400 maybe to bring the cost per plug down
grizfyrfyter
Guest
I do use different kinds depending on use. Fine grain for frag plugs and coarse sand for discs/tiles.
OurCoralReef
Guest
How much
Does it make it more bridle
grizfyrfyter
Guest
The fine sand doesn't really affect strength at all. The coarse sand actually increases strength of the material, it's not just a filler.
OurCoralReef
Guest
Thank you i really appreciate your time
Coral reefer
Past President
So why the different types of sand for plugs vs. tiles?
yellojello
Guest
So far my favorite 3” discs for purchase has been this one from Ray’s Reef on eBay:
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/263947705080
I bought a 60 pack and they arrived all undamaged. I’ve purchased ceramic ones before and had quite a few break.
As far as stem diameter, i actually purchased silicone o-rings to put on the stem for larger racks holes where they might fly out from the flow.
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/263947705080
I bought a 60 pack and they arrived all undamaged. I’ve purchased ceramic ones before and had quite a few break.
As far as stem diameter, i actually purchased silicone o-rings to put on the stem for larger racks holes where they might fly out from the flow.
grizfyrfyter
Guest
I got my delivery of $150 worth of silicone. Messed up the first two molds I poured (didn't think the positive mold 3d print was going to float in the material).
Im not happy with the round frag plug mold but I did a set of castings anyhow just to see. The model mold did the same thing but my intervention did more harm than good.
Im not happy with the round frag plug mold but I did a set of castings anyhow just to see. The model mold did the same thing but my intervention did more harm than good.
grizfyrfyter
Guest
grizfyrfyter
Guest
Made a skull for holding torch frags.
grizfyrfyter
Guest
Torch skull.
grizfyrfyter
Guest
New medium sized plugs.
