rock setup - existing tank

[Jammos]

Just wondering how to go about it.

I was wanting to put some rock levels up the side of the tank but was told that sealent in fish water = poisened fish?

If that is the case i will build a structure and place it in the corner.

So can sealent be put in water with fish?

[JMemonic]

If you are thinking of using RTV type sealant then yes some of them are poisonous but not all thankfully of we would not have many of the tanks we do today.

Some tips I have learned, chose a sealant that states it is ok for use in aquariums, none of the coloured sealants are, and ask around others to see what brands they use and what their experience of them was like.

I uses one produced by fosroc called silaflex RTV http://www.fosroc.com/Listing_Products.aspx?Item_ID=324&ExpandItem=324&Menu_ID=1&set=one&type=alpha&str=S

[Jammos]

I have got a clear sealent that says it is ok for aquarium use. so does it mean it is ok under water?

[Caryl]

If you have an all glass aquarium then it must be ok under water as the sealant in the tanks is under the water isn't it?

Lots of people silicone rocks together to keep them in place or silicone logs to the tank glass etc. If you can't make your log sink, silicone it to a sheet of perspex or glass and put it on the base covered with gravel to hold it down, or silicone the perspex to the base of the tank.

As long as your sealant is aquarium safe you can use it in the tank.

[Jammos]

ok thanks. it was just that someone told me it is only toxic while it was wet.

But thanks for clearing this up.

[Caryl]

Won't you be sticking the stuff together, waiting for it to dry, and then adding it to the tank?

[Jammos]

i was hoping to stick it to the glass in the water. thats why I asked. Silly me i didn't say that :oops: .

So is it still possible? if not I will create something then put it in.

[Alan]

Yes

Go for it,

and tell your friend to learn a bit about what he tells you

Alan 104

[suphew]

Not sure how good a contact you would get with the surfaces being wet, but I have glued in my marine tank and filled it 10 min later with no problems. If marine inverts etc survived I'm sure you would have no problems.

There are two types on silicone the one you want is the one that smells really strong (a bit like vinagar), and make sure it doesn't say anything about mold resistance

[Jammos]

ok sounds like i have the right one then.

i will post the band tonight just to make sure.

[Jammos]

turnes out that it is selleys all clear. it says on the back ok for aquarium use. but is that when it is wet? if not what sealent product shall i go buy?

[Lucid]

HI Jammos,

I use one by Holdfast and it is called "202 Clear" there are a couple out there you can use, but I have found that the 202 clear is the only one that doesn't go that whitesh colour. The 202 clear is pretty much as clear as glass and stays that way when it has been in contact with water.

JMO

B

[Jammos]

so have you used it under water? did it bind to the glass wall of the tank?

[Matt]

Hi Jammos,

Just my two cents and a possible workaround. Is it possible for you to remove the water and all your fish to a large bucket or chilly bin, clean and dry the area, use the sealant, allow it to skin (5-10 minutes) and then replace the water and fish?

Cheers,

Matt

[Jammos]

would that not still poison them?

[chimera]

questions was to hold rocks together was it not?

dont bother with silicon, use selley's aqua knead it. it works and is non-toxic. all us salties use it all the time in established tanks!!! takes a bit of practice to hold your rocks together as it loses its stickiness as soon as you put it in water but use enough of it and it holds strong.

http://www.selleys.co.nz/products/live/304/113.asp

if you have designed your rock formation well enough, you wont need to fix it to the tank itself. also try taking rocks out, drill holes and cable tie them.

[Jammos]

thats perferct thankyou