Anyone have an estimate as to what the weight/volume ratio of marco rocks gets you as compared to live rock? I know that live rock is variable, and it depends on the rock, etc… Does anyone have experience with it? Do you need the same amount of dry rock (by weight) as what you would live rock?
I would assume less since there is no water or detritus stuck in the center of the rock. On the other hand is the rock as porous? That would be the difference.
That’s kind of what my thoughts were. Seems like it would weigh less, but I suppose it depends on the materials in the rock. Just trying to find a way to get this thing up and going. Al, do you have the megaflows still?
What are macro rocks?
I have the dursos I put them in the shed to save for you
From their site,
“If Marco Rocks will be used as your primary biological filtration, the rule of thumb is 1.5 Lbs per gallon. However Marco Rocks being so porous and being shipped dry will take on any where from 25-40% of it�s weight once wet, because of this we recommend 1 Lb / gallon.”
Marco Rocks are dried out rock that people use to start their tanks instead of all live rock. Basically the downside is you have to seed it and wait for it to mature before it’s functional as “live rock”.
Awesome Al, thanks.
The rocks are fairly heavy, but for sure not as heavy as wet Figi rock. I have a good bit of it I picked up at the NJRC frag swap.(Steph won $50 off at MACNA before that)
Word of warning. If you are not buying cured rock plan on a curing time about the same as you would if you bought uncured figi or tonga or whatever. These rocks seem bare, but when you submerge them in salt water for an hour they reek! Do not plan on adding fish to the water these rocks are originally put into. Have extra salt for water changes and consider using a skimmer in what ever you are curing these things in.
That being said I personally REALLY like the look of this stuff.
marco rock is great addition to any reef… it’s actually pieces of reef rock that had been left behind by a receding ocean in florida. basically think of acropora skeletons, very porus like our very own bones lots of channels and holes.