Diy base rock I know some of you want to know about making rocks so heres the basic's for what is needed to make plenty of rock. its really quite easy. the down side is the time it takes to water cure it before it is introduced into your tank. to keep with the Reef Central lingo I will refer to this as the Kure so it isnt confused with curing your liverock. the Kure refers to the time it takes to leach the lime out of the cement.
its a loong thread but, i highly recommend reading it from the last split at least. lots and lots of good info.
http://www.reefcentral.com/forums/showthread.php?s=&threadid=1286738&perpage=25&pagenumber=1
My basic recipe uses portland cement type I II
this cool new sand i found
and a bit of perlite to lighten the rock a bit.
my basic mix is about 1:3:2-3 cement/sand/perlite
i add them all to the mixing bucket (i use a bus tub from a restaurant) and mix them well before i add any water
after they are mixed well SLOWLY add water. you dont yant to add too much. moist,crumbly, and barely sticking together is what youre going for. if its not sticking together well add a splash more water. i tend to go a bit wet and it seems to be fine.
i dont have a pic of it yet, but i'll take one next batch.
Then i decide what i want to use as a form so i dont get lots of flat bottomed turds. i have a few 5g bottles to use for forms but i like to just plop them out on the table. i have about 4" of sand and conc rubble on the table so i push that where i want it and make caves and such. its kinda like a miniature sandbox.
after the plopping i usually cover them with sand, it doesnt really hide the concrete, but it makes me feel better.
when youre done casting them cover your rocks with some plastic so they dont dry out.. After setting up and hardening for 24 hours they can be moved. so when you cast them make sure you dont need the space for a day. i've thought about using plywood squares but i dont really have the need to go that wild. soon, but not yet.
anyways, after you move them to wherever they are going to "harden" for a few weeks 3-4 is best, cover them with plastic and keep them warm and moist . i use black trash bags cut up and a 2x10 shelf in my shed to let them sit on. i am searching for the parts to make a fridge steamer and eliminate this step. (if you have an upright drapery steamer that you want to part with call me!!!)
(imagine black bags over everything)
then you wait,
and wait
and wait
then after you wait for as long as you can, 28 days is best to achieve maximum strength(as far as we're concerned) and the ph will naturally lower a few points too. then you add your fancy new rocks into a bucket of fresh water and begin the Kure (leaching of the lime). the hotter you can make the water the better. i keep my kuring bin close to 90*. the warmer the water the faster the leach. its a good idea to have some flow in there too. i just have a cheezy fountain pump, but it works well.
then you wait. i change the water in my bin every other day. thats the spendy part. water aint cheap, but i have a well so its much cheaper for me to run the pump once in a while vs. pay PID.
then you wait
after the PH falls below 8.4 it is safe to add into your tank. It is highlyrecommended to soak your rocks in old tank water and then -*test*-('") accordingly just to be on the safe side. but thats about it, start to finish is about 3 months or so, and the cost is relatively cheap. somewhere around .25-.50 lb not counting water or time.
Now go out there and make some rocks!!
:peace: :punk: :peace: :punk: :peace: :punk: :peace:
iairj84- 04-30-2008
Nice DIY Josh!
The rocks really do look good, they're darker than our "Real" Live rock but not necessarily a bad thing by any means. I am going to add another 20-30 or so of true live rock to my existing 30 now for my 90 and the rest will be DIY. I like the look of it just as much as regular live rock and more than dry base rock.
Rysam- 04-30-2008
iairj84- 05-01-2008
Love the rock... It will look even better with the Dolomite too.
Chris Bovia- 05-02-2008
Nice story and photos! Can't wait to see the stuff at the meeting. Necessity is the mother of invention! Good job. I imagine at the rate I can grow coralline I could have those rocks covered in about 3-6 months.
iairj84- 05-05-2008
It looks like this type of rock is going to be more and more neccesary in our systems in the near future... I don't know why they're banning export on rock seeing as it plays such a small part of the ecosystem but here's the link... It only applies to Tonga and they say it's "temporary"
http://www.reefcentral.com/forums/showthread.php?s=&threadid=1380526
camlov2- 05-05-2008
funny thought,
What if you bought ping-pong balls, poked small holes in them and put them inside the rocks, not so dense and more air pockets. What about straws. I seem to remember one of the problems with DIY rock being that it is so dense. I don't know about the material safety for either of these but what do you think?
iairj84- 05-05-2008
Actually the rock is more porous than normal base rock... The way they've started doing it is adding perlite (puffed glass... inert) to it and it dissolves over time... The rock is lightweight and very porous.
Rysam- 05-05-2008
the perlite doesnt dissolve. it stays as it is. but yes it is much more lightweight than the portland and salt only mix. stop by one of these days brian and i'll give you the tour. i only live a mile and a half from you.
Interesting it doesn't break down in the rock.. I would imagine the exposed parts would break down from flow though.
Chris Bovia- 05-10-2008
Thanks for sharing details and real live samples of your rock at the meeting!!!
More ways for this hobby to be sustainable and cheap! - Priceless!!! :-D
iairj84- 05-10-2008
Very nice prentation Josh... Now if only we could make that rock look like the rock in Sommer's tank :lol:
Rysam- 05-10-2008
im working on it....
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