our 55G came with the lighted hood, two 18W lights. I need something that will grow val and hydrilla (sp?) and not wash out the fish. what do you recommend?
Right now, you've got 0.6 watts per gallon (wpg). You usually want to aim for at LEAST 1 wpg, which would mean that you'll want a fixture that gives off at least 55 watts of light. But that wattage is only for low-light plants like Java Fern and Moss.
For Vals, you should probably aim more for 1.5 to 2 wpg.
High Output (HO) T5 fixtures are the most recommended around here, since they give off the purest light with a low heat output.
You are most likely going to need an entirely new lighting fixture.
I'll assume that your fixture is a double T8 fixture. Go to www.bigalsonline.com and search through the T5 fixtures there. You'll need to know the length of your tank. The rest is pretty self-explanatory in the description of the fixtures on that site.
I'd recommend buying the strip pre-built. AHsupply is good but you have to purchase your bulbs separately and that's where the savings end. Plus T5 lighting has the advantages of running cooler and a better spread.
I'd recommend buying the strip pre-built. AHsupply is good but you have to purchase your bulbs separately and that's where the savings end. Plus T5 lighting has the advantages of running cooler and a better spread.