are these rocks safe?

[Horiyoshi III]

If you notice rust on the rocks or on your glass, or brown algae forming, there are iron deposits in the rock.

Even if they look clean , they will leach.Look for this after they've been in for a little.

Worst I've ever had from that though is a serious algae bloom as it was feasting on the surplus iron.

 

[jworth]

i will look for that, thanks for the heads up.

now i am worried about the weight of the rock on a shallow sand bed. anyone care to enlighten me?

 

[orinocensis1]

yeah boil and vinigar

 

[jworth]

now i am worried about the weight of the rock on a shallow sand bed. anyone care to enlighten me?

I put it on the scale which it didnt sit quite flat so i had to balance it. i got 13.5 a billion times but the highest i got was 15.

 

[andyjs]

i will look for that, thanks for the heads up.

now i am worried about the weight of the rock on a shallow sand bed. anyone care to enlighten me?

Water is heavy, so the tank is used to a lot of weight. The only thing I'd be really worried about is it badly scratching the glass or creating pressure points that could damage the glass. I put plastic egg crate under my really big rocks to even out the weight

 

[jworth]

my camera is screwed up or id take a pic. it has an almost square bottom measuring approximately 8"x6"

 

[jworth]

got pics. top pic is top of rock and bottom is the bottom.

 

[NUMB3RS]

I would bleach it to make sure its clean

 

[le patron]

boil em, mash em, stick em in a stew!

 

[vaine111]

I put plastic egg crate under my really big rocks to even out the weight

i like that idea.