NYOSReef Cement - 500 ML

Other lower reviews just don’t understand how to use it. It works great, hardens in a few moments. Save your rock dust to cover the cement before it dries. Very strong and durable

This is a great product! For the buyers that gave it a low rating, don't blame the product because you can't figure out how to use it. Is does take a little practice to get it right, it must be mixed well and to the right consistency. Believe me, it works at least 10 times better than the putty stuff, that doesn't work at all unless you also use super glue to attach the frag plug to it. Might as well just use super glue gel in that case. Since this product has a high moisture content when mixed, it binds extremely well to underwater structures and frag plugs. The only downside is you must make sure it's where you want it, or you might not be able to move it. It works amazingly well. Anyone that can't figure out how to use it, please send it to me! ;-)

I’m going to make nice and simple. This product is not that great. The 1st Pic I added is a base i tried doing. I let it sit over night and it still cracked. Out of the whole jar I was able to get some peace together but some was still breaking off after I thought it was set and hard. after sooo many tries, I just gave up on this product. I did not have this trouble with E-Marco ( set it and forget it ) THINK TWICE BEFORE YOU BUY.And I put a pic of my tank just to indicate I’m not an amateur. Been in this game for a long time.I just decided to use something different.

TOTALLY WORTH IT and pretty much one of only a few options for reef cement out thete. i'm in the trades so i'm used to working with mortars, grout, spackle....this stuff was very hard to get the hang of and theres not a lot in this tub so you better learn fast! I will tell you #1 set yourself up ahead of time...get a bowel of water, know what pueces your joining and mix small batches. Use a squirt of lemon/lime juice to keep the stuff "open" and workable. I used it to cement lil rubble frag pieces to make my own aquascape. i let it dry a day and am curing it now...so far no major ammonia spikes but its been one actual day in my rock cycling tub so we'll see. I also didnt test ph either so time will tell. It does feel very sturdy since the mortar cured.Tips: use/make little putty knives, butter knives, tiny margin trowel....even wooden cuticle pushers will help if ur aquascaping. seal out the air and work the cement smooth after you joinbtge two pieces together2. once you connect the 2 pieces, dont let them go or reposition....hold em tight for a minute or two so u dont break the bond3. work fast, the mortar should be the consistency of joint compund or like icecream (bad example).

Muy buen cemento pega rápido y da muy buena firmeza

Ive used Nyos and Marco cement for building aquascapes. Compared to Marco, Nyos mixes up smoother and the end result is more clean. You need to mix it 3 parts powder to 1 part water. If you add some citric acid to the water you can extend the working time. You have to mix small quantities at a time and use a spatula or backnof a spoon to incorporate the powder with the water. Wait until it gets doughy before you try to add it rock otherwise it will be to loose and fall away from the rock. When the mixrure starts heating up (exotherming) you have to work more quickly. Marco cement gives you more time but sets up grainy.

Comparison to the other popular EMarco mortarPros: A sand based mortar that sets strong and to a good neutral pale brown color. Regular EMarco dries to a bright gray (or pink) that looks out of place, until coralline starts to cover it 6 months to a year down the road.Cons: Very expensive vs EMarco, probably 3-4 times more by material volume. But the biggest complaint is it sets WAY to fast. It is unworkable within 5 minutes. EMarco takes a more reasonable 20 mins.Conclusion: If you have a small job and need a quick setting mortar, you might justify the cost. But having used both extensively on my 400lb aquascape, "pink" EMarco is superior in every way

Works great as long as you follow instructions, I found it works best if you do one rock at a time, since it does tend to dry quick. The instructions say to add water and make it play-do, I found it works best if you make it muddy like, works into the porous in the rock better.Build your structure out of the tank! I would use again!