Thickness of marine set-up - Page 2

08-12-2005, 03:30 PM

Would be alot better if it is 12mm for a 4ft tank.

10-12-2005, 01:57 PM

Quote:

Originally Posted by aCe^bOwleRz

Is it safe for a tank with dimension 60cm x 20cm x 30cm (L x W x H) and 4mm in glass thickness to be used for marine keeping?
I believe that we need thicker glass for marine because of the denser saltwater, but with such low height, will it be safe?

60 cm should be roughly a 2.5 footer.
At least you need a 8 mm.

Regards

**KaLiB** · 11-12-2005, 02:08 AM

60cm is 2ft. 4mm thickness is a little risky, you should use at least 6mm for a 2' tank and for a 2' tank with 2' depth, i would suggest using 8mm to be safe.

12-12-2005, 01:21 PM

Over here in Malaysia, I've work closely with a couple of tank manufacturers before in the past. And basically as far as they're concerned, they have certain guidelines as to how thick glass should be - mostly dependent on height :

<= 12" - 4mm
13 - 18" - 6mm
19 - 21" - 8mm
22-24" - 10mm
25-30" - 12mm
31-36" - 15mm
37-48" - 19mm

Water pressure is dependent on height and not area. This means that in theory, if you increase the length and/or width of tank, but maintain the height, you can use the same thickness. HOWEVER, if your tank is ridiculously long like 12' X 2' X 18"H, it's always safer to get the next higher thickness and to use extra glass bracings. This is cos even long pieces of glass will flex and bend.

SW isn't that much heavier than FW - average SG is only 1.024-1.025 (FW is 1.000). Rocks and sand do not contribute to water pressure - they only add extra weight to the bottom sheet, so you could opt for a thicker base to be safe.

HTH

11-12-2005, 02:08 AM	#13
KaLiB Moderator Join Date: Jun 2002 Posts: 3,635	60cm is 2ft. 4mm thickness is a little risky, you should use at least 6mm for a 2' tank and for a 2' tank with 2' depth, i would suggest using 8mm to be safe. __________________ A fishtank is just like your computer. When your tank crash(OS crash), its time to cleanup(reformat hard drive) and setup(install OS) again and add new livestock(re-install software).

08-12-2005, 03:30 PM	#11
nim75sg Guest Posts: n/a	Would be alot better if it is 12mm for a 4ft tank.

12-12-2005, 01:21 PM	#14
deep_end Guest Posts: n/a	Over here in Malaysia, I've work closely with a couple of tank manufacturers before in the past. And basically as far as they're concerned, they have certain guidelines as to how thick glass should be - mostly dependent on height : <= 12" - 4mm 13 - 18" - 6mm 19 - 21" - 8mm 22-24" - 10mm 25-30" - 12mm 31-36" - 15mm 37-48" - 19mm Water pressure is dependent on height and not area. This means that in theory, if you increase the length and/or width of tank, but maintain the height, you can use the same thickness. HOWEVER, if your tank is ridiculously long like 12' X 2' X 18"H, it's always safer to get the next higher thickness and to use extra glass bracings. This is cos even long pieces of glass will flex and bend. SW isn't that much heavier than FW - average SG is only 1.024-1.025 (FW is 1.000). Rocks and sand do not contribute to water pressure - they only add extra weight to the bottom sheet, so you could opt for a thicker base to be safe. HTH

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