于 2004-07-15 10:59 My tank is 48" x 18" x 24" (L x W x H) and I'm using 1 x T5 (20 watts daylight) and 2 T4 (blue). Plan to add in 2 more T5 daylight. but if its not really good for coral.. I will change to MH. So just want to know that will T5 HO enough for a coral tank? or better change to MH. Thank you so much!!!