Subj : Re: 120 Gallon tank
To   : Scott Brown
From : Jeff Snyder
Date : Mon Jun 29 2009 04:41 am

On 06/29/09, Jeff Snyder quoted Scott Brown: 120 Gallon tank.

SB> I have a 120 gallon tank that I want to setup, but it does not have a top.
SB> Any suggestions of what to use? It's a old tank, so there is no model
SB> number to order one for it. Would plexi glass work, or should I have one
SB> cut out of glass?  Thanks, Scott Lord Blue The Realms Of Blue BBS


Hello Scott. Based on my own experiences over the years, while glass is
heavier than plexiglass, in the end, I believe that it is the better choice
for two reasons.

First, over time, if it is subjected to enough heat -- from aquarium lights,
for example -- plexiglass will eventually begin to slowly warp.

Second, being as it is a type of plastic, over time, it will also begin to
turn yellow.

My advice is that you go to a local glass company -- unless you have
experience with glass cutting yourself -- and have them cut the right-sized
panes for you, making sure that they smooth the edges properly, and glue on
handles to each piece with non-toxic aquarium silicon.

Rather than make just one large cover, two panes -- or more, depending on
the front-to-back width of your tank -- is advisable. That way, you can
remove only what is necessary while cleaning out the tank.

Another option -- which I personally use on my main four-foot tank -- is to
not use a glass cover at all. This approach serves several positive
purposes:

1. Your aquarium water will stay cooler being as heat is not being trapped
between the glass lid and the water surface, or being transmitted to the
water through the glass lids, which can conduct heat from your light
sources.

2. You will have a better gaseous exchange at the water level, being as
there is nothing there to trap the gases.

Of course, not using a glass cover also has its negative points as well,
such as:

1. Your livestock could possibly jump out if water conditions are poor, or
if they are excessively threatened by another tank mate.

2. The level of evaporation will be higher, which means you will have to top
off the tank more frequently, particularly if the tank is situated in an
air-conditioned room.

In the end, it is really your choice. The above are just some ideas for you
to consider.


Jeff Snyder, SysOp - Armageddon BBS  Visit us at endtimeprophecy.org port 23
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