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post #1 of 11 (permalink) Old 12-01-2014, 11:01 PM Thread Starter
k38
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Open tanks

Hello,

Back in the hobby after long absence.

I see many open tanks on this site, and indeed, the tank I'm setting up, a Nuvo Fusion 20, has a screen top, for all intents and purposes an open tank (does keep the critters from jumping out). Back in the day, open tanks were frowned upon because of stuff getting into the water from the air. I wonder what's changed in the thinking of aquarists. I know of course that there are still plenty of canopies and hoods still out there.

What about it? Do you worry about atmospheric pollutants?

Bill
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post #2 of 11 (permalink) Old 12-01-2014, 11:08 PM
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Bill, Like you I was out for a long time and just got back. I did add tops to both of my tanks because here in Colorado it is so dry evaporation is a real problem, but I think what has changed is Lights and the growing of plants. Glass tops reduce your lights by around 10%, anyway that's what I've been told. I actually forgot we use to worry about pollutants from aerosols and cleaning supplies.

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post #3 of 11 (permalink) Old 12-01-2014, 11:13 PM
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i havent worried too much about contamination. i do have to add about a gallon of h2o a week just to keep the water level where i want it.

but i have a heat lamp for my turtles to bask under haha
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post #4 of 11 (permalink) Old 12-01-2014, 11:14 PM
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If you use any common sense there is little danger from air pollutants. Many of us also change about half the water in our tanks every week, which dilutes whatever accidentally gets in the water. Also, any gaseous pollutants get into the water even if there is a glass cover on the tank. The tank is never sealed off from the air.

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post #5 of 11 (permalink) Old 12-02-2014, 01:02 AM
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There's also been several decades now of manufacturers and consumers moving away from heavy use of aerosol products and towards a much better understanding of it *not* being healthy to spray irritants and potentially toxic chemicals in the air and on the surfaces we routinely touch.

Living in Arizona, evaporation is a constant with my tanks but it's well worth the hassle of keeping them topped off and doing a few extra heavy water changes to combat creeping TDS levels as, along with all the usual benefits involving light levels, accessibility, etc., they're also wonderful natural humidifiers. My skin, nasal passages and houseplants are all much happier with a few extra gallons of water in the air.
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post #6 of 11 (permalink) Old 12-02-2014, 01:51 AM Thread Starter
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Quote:
Originally Posted by Hoppy View Post
If you use any common sense there is little danger from air pollutants. Many of us also change about half the water in our tanks every week, which dilutes whatever accidentally gets in the water. Also, any gaseous pollutants get into the water even if there is a glass cover on the tank. The tank is never sealed off from the air.
Common sense, water changes, both good things. And no tank is or should be sealed completely off from the atmosphere. Having said that, I notice a film forming on the surface of still RO water in my house--non-smoking, very little use of aerosols, malodorous chemicals, greasy cooking, etc. Of course vigorous surface movement will disperse this film, but then it's just being mixed into the water column.

But clearly many highly successful tanks are uncovered . . .

Bill
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post #7 of 11 (permalink) Old 12-02-2014, 10:48 AM
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Surface skimmer - removes dust, small leaf parts, etc.
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post #8 of 11 (permalink) Old 12-02-2014, 12:51 PM
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For me having fish jumping out is enough for me to have a top. I would say in the last year I have lost at least 10 fish from jumping out. I see no advantage to keeping the a tank without top. All you will do is be add a lot of water.

Last edited by Clear Water; 12-03-2014 at 01:34 PM. Reason: 1
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post #9 of 11 (permalink) Old 12-02-2014, 01:14 PM
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Film that gets mixed with the water finds its way into the filter where it gets removed. Surface skimmer is another way of getting rid of the surface scum.

I have mostly open top tanks, and like the looks of driftwood and some plants growing out of the tops of the tanks.
I might go back to covered, though, for heat retention.
They sure were evaporating through the summer, though!
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post #10 of 11 (permalink) Old 12-05-2014, 11:35 PM
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Quote:
Originally Posted by Clear Water View Post
For me having fish jumping out is enough for me to have a top. I would say in the last year I have lost at least 10 fish from jumping out. I see no advantage to keeping the a tank without top. All you will do is be add a lot of water.
Its all personal preference at the end of the day. I removed the glass tops years ago and I will never return to them. Extra parts to clean, in the way of feeding and tank maintenance, less atmospheric exposure for gas exchange and limits hardscaping just as Diana stated.

I look at the evaporation as a good thing. Once I loose 1/4 of a my tank, I know its time to do tank maintenance and change the water. Running a sump will eliminate the evaporation in a display tank. This and the fact that equipment can be relocated from the display are two reasons many including myself are turning to sumps.

As Hoppy mentioned, there is really little to worry about when it comes to contaminants when a little logic is applied. I have only encountered 2 jumpers in my 13 years in the hobby. Having jumpers really depends on the species of fish being kept. Any fish can potentially jump but there are certain ones that do it notoriously.

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post #11 of 11 (permalink) Old 12-07-2014, 12:33 PM
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Its all personal preference at the end of the day. I removed the glass tops years ago and I will never return to them. Extra parts to clean, in the way of feeding and tank maintenance, less atmospheric exposure for gas exchange and limits hardscaping just as Diana stated.

I look at the evaporation as a good thing. Once I loose 1/4 of a my tank, I know its time to do tank maintenance and change the water. Running a sump will eliminate the evaporation in a display tank. This and the fact that equipment can be relocated from the display are two reasons many including myself are turning to sumps.

As Hoppy mentioned, there is really little to worry about when it comes to contaminants when a little logic is applied. I have only encountered 2 jumpers in my 13 years in the hobby. Having jumpers really depends on the species of fish being kept. Any fish can potentially jump but there are certain ones that do it notoriously.
Why I don't disagree with you on a cover for a tank and I have gone without myself but have had to add water two times a week.

But to use evaporation as a guide to maintenance wouldn't work for me. I'm just to organize to let it go on hit or miss. I use a schedule and stick to it pretty much. But the lost of fish drives me crazy. Three week in a q/t tank and no sooner in there main tank and to the floor they go. Try keeping hatch fish without a cover.
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