What should I be doing? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources

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post #11 of 14 Old 08-31-2012, 11:50 AM
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Picking up on your several questions in the last few posts...

Algae increasing is due primarily to light. It is a very simple equation/balance issue. Plants need light of sufficient intensity balanced by all nutrients in order to photosynthesize, and when this occurs algae doesn't have a chance to become problematical. Some algae will always be present,k it is natural; but excess we can avoid.

Increasing all the nutrients to balance the light is one way to go, but I prefer the opposite; lower the light intensity to balance the nutrients. My first priority is the fish, and knowing they will be better under less light, I start out with the light that will achieve decent plant growth and nothing more, then I add nutrients to balance. There is no formula for this because every aquarium is different due to the source water (hard minerals), fish load and feeding, and plant species.

In my opinion a dual T5 HO light fixture is simply far too much light over any tank that does not have CO2 diffusion. And the CO2 is far different from the liquid carbon additives. The fact that not all plants respond to the liquids says it all.

There are several dual T8 fixtures available, Drs. Foster & Smith have some and so do other sites. I have two 48-inch T8 tubes over my 5-foot 115g tank and I still have to control the light duration to keep algae at bay.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #12 of 14 Old 08-31-2012, 09:21 PM Thread Starter
Thanks Bryon and Quantum! Bryon, do you agree with Quantum that I should go with a standard T5 dual bulb fixture based on fact that my tank is 24 inches deep or should I go with a dual T8 fixture?

Thanks again guys!
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post #13 of 14 Old 09-01-2012, 11:13 AM
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Quote:
Originally Posted by hywaydave View Post
Thanks Bryon and Quantum! Bryon, do you agree with Quantum that I should go with a standard T5 dual bulb fixture based on fact that my tank is 24 inches deep or should I go with a dual T8 fixture?

Thanks again guys!
As you are having algae problems, the dual T8 would be better. I have this over my two 24-inch deep tanks. If you were hopting to grow the mini carpet type plants, this might not be sufficient, but then you would need CO2 for that. You can see in the photos of my tanks the good plant growth under this light.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #14 of 14 Old 09-01-2012, 11:59 AM
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the difference in light output of T8 and non-HO T5 per unit length is negligible, so the choice really comes down to other things like cost, etc.

need to differentiate between standard T5 and High Output T5, they are different, most importantly in the amount of electrical current (indicated by the wattage numbers) sent to the bulb, which is controlled by the ballast
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