Lid on or off?
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Old 05-15-2015, 10:18 PM   #1
StellaStars
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Lid on or off?


Hi all,

I have a Radius 5G that I've just been setting up this week. I've got some plants going and a couple of fish.

The planted rimless tanks I've been seeing in the store and online all leave the tops open. This one came with a plexi-glass top that I've got on.

Can you tell me the pros and cons of leaving it off?

I like the idea of leaving it off. It might be prettier and I'd love to have some plants coming out the top. The LFS even had a philodendron with some runners along the top sending roots into the tank. But I also worry about fish jumping and also additional evaporation and maybe more extreme temperature shifts?
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Old 05-15-2015, 10:34 PM   #2
nayr
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better gas exchange, no par lost to dirty lid.. you will evap water quicker and shed heat quicker.. if your heated this will use a lil bit more electricity, if your unheated it will keep you closer to ambient temps.

unless you have some jumpers take it off, if your going out of town and worry about too much evap before you get back or someone takes care of it put it back on.
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Old 05-15-2015, 11:59 PM   #3
Betta132
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Basically all fish jump if scared. Floating plants can reduce the risk, but they aren't a guarantee.
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Old 05-21-2015, 09:40 PM   #4
Miss Cellany
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I've kept most of my tanks lidless for years and only had any of the fish jump when I was disturbing their tank moving decorations / plants around (only 3 jumps in total over 5 years).

Most fish won't jump out of the tank without a good reason (excluding those that jump often as part of their natural behaviour e.g. Pantodon buchholzi, archerfish and hatchetfish etc). Fish that are stressed by disease, overcrowding or bad water conditions are much more likely to jump than happy, healthy fish.

Evaporation can be extreme in the hotter drier months with lids off - I top up with about 3l of distilled water a day on the 100l tank (it gets expensive ). If you don't use distilled / RO water for top offs you increase the hardness of the water over time - not good for most fish!

If you need to keep a constant water level (e.g for hanging filters or overflow systems) or don't want to keep topping off with distilled water it's probably best to keep the lid on.
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Old 05-21-2015, 10:30 PM   #5
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My fish have only ever jumped in and out of my HOBs. Never outside but every fish is different I guess. Constantly topping off is a bit annoying on tanks that are far from water sources though.
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Old 05-24-2015, 11:16 PM   #6
StellaStars
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Interesting.

Making the water too hard isn't a problem for me. My tap water/tank water tests at about 0GH right now. I'm actually looking into how to increase hardness because I'd like to add shrimp eventually.

Was leaning towards lid on because avoiding evaporating/jumping/temperature fluctuations seemed worth it, but now I've started researching ripariums.

I love the look and I'm already experimenting with one little spider plant start in the back. I'd love to do more of that and maybe introduce a floating plant, which is making me consider lid off again.

Just minnows and rasboras in there, so hopefully they're not jumpers.
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