i have another question

[sin]

first off let me say sorry for asking so many questions im sure its getting anoyying and also for not taking the time of day to proofread my posts...i kow that must also get extremly anoyying.but onto my current question.the light ive got coming in the mail i beleive was a 18watt light not sure wheat type but i remember its 18 watts and has some moon thing on it so i can change it and its blue it look really cool.it used to be my dads..ive also got my stock light that came with the tank that i know nothing about...with that 18watt will i be able to grow any corals in my 20g?or will i need to upgrade?if so what would be best?i beleive someone suggested a viper MH but ive been reading about them and apparantly they can get hot and are very expensive..i dont really want to buy a light and a cooler so im looking for somehting that doesent get too hot

[erikharrison]

TBH a Viper wouldn't really be too hot. If temp does become a concern, you can put a clamp on fan to blow air across the surface ofthe water. 18w more than likely will not grow out any corals. If heat is a concern, look into power compacts. If you want to do clams anemones or sps, they would all prefer a Metal Halide to any other light. As light hits water, the deeper you go, the less penetrates. We fight this in our hobby with wattage (until the solaris) and Kelvin rating. If you just want to keep some small stuff and an anemone, by all means look into power compacts.

[sin]

how much would hte viper cost me?

[erikharrison]

Click Here (70w) (http://www.marinedepot.com/ps_ViewItem~SearchStr~viper~action~view~idProduct~ JB9111~idCategory~FILTFIMHCO~category~JBJ_K_2_Vipe r_70W_HQI_Clamp_on_Lamp_Lighting_Fixture_Saltwater _Aquarium_Supplies_Lighting_Fixtures_Metal_Halide_ Clamp_On~vendor~.html)
Click Here (150w) (http://www.marinedepot.com/ps_ViewItem~SearchStr~viper~action~view~idProduct~ JB9113~idCategory~FILTFIMHCO~category~JBJ_K_2_Vipe r_150W_HQI_Clamp_on_Lamp_Lighting_Fixture_Saltwate r_Aquarium_Supplies_Lighting_Fixtures_Metal_Halide _Clamp_On~vendor~.html)

HTH!

[sin]

wow thats gonna run me back a pretty penny... thanks for the info