Lighting for 70G

lucky777ca

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Jan 25, 2006
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Instead of making a 90G tank, my parents just accepted to buy a 70G from a friend of the family (48"x18"x18") with 2 glass lids, an AC 110 (just added an AC70 for the other end of the tank) and a light fixture for a 29G (~30" or so) for $250.

The tank will be house some schools of smaller tetras, a school of 6 cories, a lone krib, maybe a pair of rams, a school of 6 otos and various plants (Elodeas, Sagittarias, Echinodorus, etc).

I'll be looking into getting some of the other products of Seachem for fertilizers and a DIY CO2 (maybe 3 bottles changing the mixture of one every weeks, ie. change mixture every 3 weeks). I just got two bags of Playsand from Superstore around here and will be using it to provide about 2.5" of substrate.

I also have some root tabs and putting in some Malaysian Trumpet Snails to help in preventing the accumulation of H2S in the sand, while supplementing with the weekly turning over of the sand after performing the weekly partial water changes on this tank.

Anyways, would it be sufficient to get two of the 48" fixtures that they sell at Home Depot, Rona, or any other stores for lighting for a lowlight planted tank? They will have two light bulbs (32 - 40 W each bulb) on each fixture. I'll probably be purchasing the Daylight Deluxe (6500K colour temperature) T12 fluorescent bulbs for a 48" fixture manufactured by Philips (most probably).
 
You're talking about shop lights right? If so, with two 40W bulbs you'd be barely breaking 1WPG over that 70G. And since it's shop lights, you'd also be losing a significant percentage of light (poor reflectors).

Just get higher wattage bulbs and you should be fine for low-light. In my case, I was on a budget for my 20g and had rigged up a shop light ($8) with two 32W bulbs (3 for $1 :P). With that, I can grow medium-light plants easy.
 
You can't just put higher wattage lights in a shop light. The ballasts are only (barely) rated the the bulbs they suggest.

Two shop lights will work. It will look like crap and be a pain to deal with but they will work.

I would highly suggest you look into bulk dry nutrients.
 
Miyavism:

it will be two shoplights, each supporting two bulbs with a maximum (I presume) of 40W each bulb.

Rex:

The effects of the light on the inhabitants, or the look of the fixtures on top of the tank?

I'll be looking at those dry nutrients (I'll just have to look around, as I don't think the LPS near my house sells them, might have to check the other larger chain stores).

I'm not sure, but I might be able to get some other fixtures instead, such as those manufactured by Coralife (maybe two of those fixtures that supports 2-28W bulbs), or maybe the higher end ones...

48" Aqualight With 2-65 Watt 50/50 Lamp Straight Pin Base for ~$250
48" Aqualight T-5 (28 Watt Colormax Full Spectrum T-5 Flourescent Lamp & 28 Watt 6700K Plant T5 Flouresent lamps) for ~$100
 
I've had shop lights over a tank. They are just a hassle to deal with and look totally ghetto. The light will not bother the inhabitants.

You won't find the bulk dry nutrients at a pet store unless you are extremely lucky. If you find them buy lottery tickets.

Of the light fixtures you list only the first is any good. The second is only 56 watts. That's a bit low for a 70 gallon tank.
 
I would go with a light kit from AHsupply.com great prices on absolutely top notch stuff if you can assemble yourself. The also sell very cheap canopies to hold the lighting. Take a look. I would go for a 2x55 setup based on DIY CO2.

I use a 4x55 setup of their in my 90G (same length and width as yours, but deeper). I run pressurized CO2.

For nutrients, try http://www.aquariumfertilizer.com/ you can go with the pre mixed PMDD or mix your own. Plenty of formulas out there. I use PPS-Pro.

I quick note: you generally do not add dry nutrients to the tank, but mix up a solution and use that. It end up much cheaper than buying commercial fertilizers.
 
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Rex: Actually, if I do get the second one, I'll buy two of them (total of 112W)

Snickle: do they ship to Canada? They have some pretty awesome prices at AHsupply.com... I'm not that handy, but I might give it a try (depends on what my parents say :)... like the one about building my own 90G => 48"Lx24"Wx18"H, where they say that it might leak and such, therefore buying a 70G became the best way of getting a larger tank).
 
Rex: Actually, if I do get the second one, I'll buy two of them (total of 112W)

Snickle: do they ship to Canada? They have some pretty awesome prices at AHsupply.com... I'm not that handy, but I might give it a try (depends on what my parents say :)... like the one about building my own 90G => 48"Lx24"Wx18"H, where they say that it might leak and such, therefore buying a 70G became the best way of getting a larger tank).

its very easy. i just installed mine. wasnt hard at all. took a few mins.
 
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