As long as it's the crystals and not the pellets
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I made about 15 lbs or so. It looks reals bump and it absorbs water like a sponge so it is a really efficient bio filter and it looks good. I left it in the sin when I took it out of the sand it it hardened more. How come it grew little white crystal things in the aquarium? My red slime already took advantage of it!
Well I guess that is my problem. I tested the Ph last week and it was 9.2 last time I adding diy rock (about 4 months ago I think) it killed my other flame scallop and I recently got a new one and killed it again....
He used it. Where did you get it?I can never get my rocks to be that porous, I must have my mixture too wet. do you just make little droplets of cement or just throw it on there in big globs?
also I found if you use the low alkaline Portland I/II it has a pre-"kure" pH of about 8.6, I have made rocks for 3 of my reef tanks and this is the last tank I did about 2 years ago (still running the tank today). The first day after filling with fresh tap water the pH was 8.6, after an overnight soak I drained the tank and filled it with RO/DI water and added salt, when I tested the tank the pH was 8.4, and after a quick bacteria cycle I moved over my corals from my previous tank. In another tank I added a 40lb DIY rock into a 55g reef tank and there was no pH flux at all. Also I'm using a pH probe and calibrated meter for testing. The other great thing about the low "pH" cement is that you can get it on your skin with no (for me anyways) reaction unlike the high pH Portland cement. The only issue seems to be curing time and cured strength, it takes 2-3 times longer to get a good solid cure, and sometimes the mix just dose not cure right and turns into powder with any good bit of pressure.