sealing brick water feature

[jules21]

can anyone offer advice on how best to seal this water feature?

http://i803.photobucket.com/albums/yy314/julesdb/backyard%20reno/P1030090copy640x480.jpg

i've seen Pondtite at the local bunnings. due to rocks penetrating out of the ground, a plastic membrane isn't really practical.

fyi both of the square 'holes' in frame will form the water feature.

[Master Splinter]

Remove the rocks, add 50mm of concrete on the bottom, then seal with pondtite.

OR

Just fiberglass and polyester resin, then seal with the pondtite goop.

[jules21]

thanks. the rocks aren't going anywhere - they're the 'tip of the iceberg'. i will concrete around them and use pondtite to seal. i assume if the water feature is 'sealed' with brickwork and concrete, then only pondtite is necessary (i.e. no GRP).

[Master Splinter]

You'll probably need to put a reinforcing fabric at all the corners to make sure that any minor movement is catered for.

[Oldsaltoz]

Two layers of fibreglass topped with flow-coat (Resin with a colour pigment) will make thos look fantastic, also very easy to clean and maintain.

[jules21]

Two layers of fibreglass topped with flow-coat (Resin with a colour pigment) will make thos look fantastic, also very easy to clean and maintain.
this sounds good. until i got a quote for the fibre glass (15m2), which came to $600! ($270 for the resin alone) is that too much or am i being tight?

edit: 2nd quote came up exactly the same

[Master Splinter]

Ummm - try your local fiberglass place...from memory, $10-15 per square meter for cloth and polyester resin is about $15 per liter.....