Flying Styrofoam.
Ok.... So here's where it got interesting.....
I did all my research.... learned all about applying concrete over styrofoam, and one day after finishing a coat of paint, I headed for the Man Cave to start. I already had a friend help me carry the tank and stand down, I already stripped silicone that the turtles shredded to bits, and I already fixed a crack in the bottom of the tank by using my fancy "glass repair bonding agent" to seal the initial crack or at least bond it back together, and then cut a plate of glass and siliconed it in just for insurance. The tank was then leak tested to make sure said repairs worked. (they did)
So I went out to the shed and dug up some pink foam that someone was throwing out where I used to work and I had always said to myself "That will come in handy for SOMETHING" so I grabbed it.
First I cut a piece to fit the back of the tank:
And then I had to cut it into three parts to fit in the tank because of a brace that goes across the top of the tank. I then put it back in and considered where to put the filtration and all that jazz. I'm using two Fluval Cannister filters, one on each side of the tank, so I carved in a groove for the filter intake:
I was using an air powered angle grinder with a wire wheel mounted. FASTER than a hot knife through butter let me tell ya!!!! Why use knives and stuff to carve the foam when you can use POWER TOOLS! (Making best Tim Taylor Grunt)
I then bonded on strips of foam using West System Epoxy. I build boats as my other Hobby and I have used West System many times with this foam, and it works awesome. It was what I had laying around.... so I used it. I was going for a sedimentary rock formation type look, so I bonded the layers all Paralell, and had some of them overlap the adjoining pieces to lessen the look of the seams:
Then I carved all the layers to look like rock:
Then it was time to apply the concrete. I used QuickCrete Sand Topping Mix. I mixed it thin, brushed on a few coats allowing approx, 24 hours drying time (with misting 5+ times a day) in between coats, and applied my last coat with a color tint from QuikCrete.
I siliconed the foam background in, and weighted it down till the silicone cured:
and I then Used a thick layer of the Topping Mix to Make the seams invisible:
The background, now upright:
"Honey! C'mon.... we gotta get this room done!!!!!"
"Oh.... Uhhh.... Right. Be up in a few minutes hon! Just gotta take a few more pictures of the tank!!!!"
":::Grumble, mumble::::" From the top of the stairs.
Oh yeah... One more picture. The tank set up, background in, filled with water to Leach the lime out of the Concrete, and a piece of wood soaking to get the tannic acid out of it and help it sink. (I figured it wouldn't hurt and I could kill two birds with one stone.... The wood leaches Tannic Acid, and the Concrete leaches Lime which theoretically should cancel each other out.)
It is at this point that I need to post a disclaimer:
"I am NOT an expert and I am bumbling my way through this. Any questions, comments, or anything of the sort are highly appreciated, and will not hurt my feelings!!!!!"
The next installment should probably be termed "The minor complication"
Stay tuned folks for more info.
Ok.... So here's where it got interesting.....
I did all my research.... learned all about applying concrete over styrofoam, and one day after finishing a coat of paint, I headed for the Man Cave to start. I already had a friend help me carry the tank and stand down, I already stripped silicone that the turtles shredded to bits, and I already fixed a crack in the bottom of the tank by using my fancy "glass repair bonding agent" to seal the initial crack or at least bond it back together, and then cut a plate of glass and siliconed it in just for insurance. The tank was then leak tested to make sure said repairs worked. (they did)
So I went out to the shed and dug up some pink foam that someone was throwing out where I used to work and I had always said to myself "That will come in handy for SOMETHING" so I grabbed it.
First I cut a piece to fit the back of the tank:

And then I had to cut it into three parts to fit in the tank because of a brace that goes across the top of the tank. I then put it back in and considered where to put the filtration and all that jazz. I'm using two Fluval Cannister filters, one on each side of the tank, so I carved in a groove for the filter intake:

I was using an air powered angle grinder with a wire wheel mounted. FASTER than a hot knife through butter let me tell ya!!!! Why use knives and stuff to carve the foam when you can use POWER TOOLS! (Making best Tim Taylor Grunt)
I then bonded on strips of foam using West System Epoxy. I build boats as my other Hobby and I have used West System many times with this foam, and it works awesome. It was what I had laying around.... so I used it. I was going for a sedimentary rock formation type look, so I bonded the layers all Paralell, and had some of them overlap the adjoining pieces to lessen the look of the seams:

Then I carved all the layers to look like rock:

Then it was time to apply the concrete. I used QuickCrete Sand Topping Mix. I mixed it thin, brushed on a few coats allowing approx, 24 hours drying time (with misting 5+ times a day) in between coats, and applied my last coat with a color tint from QuikCrete.


I siliconed the foam background in, and weighted it down till the silicone cured:

and I then Used a thick layer of the Topping Mix to Make the seams invisible:

The background, now upright:

"Honey! C'mon.... we gotta get this room done!!!!!"
"Oh.... Uhhh.... Right. Be up in a few minutes hon! Just gotta take a few more pictures of the tank!!!!"
":::Grumble, mumble::::" From the top of the stairs.
Oh yeah... One more picture. The tank set up, background in, filled with water to Leach the lime out of the Concrete, and a piece of wood soaking to get the tannic acid out of it and help it sink. (I figured it wouldn't hurt and I could kill two birds with one stone.... The wood leaches Tannic Acid, and the Concrete leaches Lime which theoretically should cancel each other out.)

It is at this point that I need to post a disclaimer:
"I am NOT an expert and I am bumbling my way through this. Any questions, comments, or anything of the sort are highly appreciated, and will not hurt my feelings!!!!!"
The next installment should probably be termed "The minor complication"
Stay tuned folks for more info.