what watts do I need for soft and hard coral without using halides?
I have 46 gallon bow-front tank.20 inch deep. I really would like to do hard and soft coral but don’t want to use halides. So can I have hard coral without use halides. Also what wattage do I need if use florescences or LEDs for my size tank? The hood I know has to be modified it only hold 1 24″ florescent light. I know for one white bulb I need one blue but I will only be able to hold 3 24″ florescences. If I can’t just have 3 bulbs then maybe LEDs but how do u know the watts equivalent that I need? Thanks for any help. I want to do this right.
It is not a question of watts although that will directly affect your intensity. It is always a question of required colour spectrum for the inhabitants you keep.
LED’s do not have sufficient spectrum or intensity to support the corals you wish to keep.
24 inch florescent tubes will supply the spectrum – use one or two of type with an actinic spike on the curve for your blue requirement. I would use 6 or 8 regular compact florescent on a vanity socket for your white light penetration and modify the canopy to allow for the additional headroom required. The ballasts on the compacts will supply enough heat to wrap a water line around each base for supplimental water heating. This will extend the life of the ballasts. Alternately you could use low voltage halogen spot lights instead of the compacts.
You may have to engineer a solution that is beyond the design of your current system. This means replacing the canopy or having it modified to accomodate your requirements. I have used halogen lights on the front face of the tank at night when I’m not viewing the tank. This required a retraction rig to lift it above the canopy into a shroud housing for esthietics during viewing hours in the daytime.
Anchoring your hard corals on a pedestal would bring them nearer to the surface reducing the intensity required to illuminate them. The soft corals or live sand would accept less light at the front the bottom of the tank and still be healthy.
I always recommend consultation with your local marine specialist. We need to encourage them to continue be there for information and supply. Even if you choose to buy some of your components as pre-owned items because of budget restrictions, your consumables are the bread and butter of you local operator.
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