T-5 bulbs range in wattage from 24 to 54 and can last up to two years. Unlike some types of high intensity lighting, T-5 bulbs are cooler running and do not require a fan. These bulbs are best suited for both reef tanks and a freshwater planted tank setup that are less than 24 inches deep. Personally, I prefer to use the T-5 lighting setup in my planted tanks.
1 Confirming the presence of your babyâs heartbeat. 2  You may have gone to your doctor with vaginal bleeding or you may be anxious because of problems in a previous pregnancy (such as miscarriage). 3  This ultrasound can routinely detect a heartbeat in your baby as early as 6-7 weeks. transvaginal ultrasound is usually required to see the baby at this stage of the pregnancy. Your baby is just a tiny embryo. Although the ultrasound may see your baby, it measures only a few millimetres long, and it is too early to always detect the babyâs heartbeat.
You may hear your babyâs heartbeat for the first time at your dating scan. Your dating scan usually happens between eight weeks and 14 weeks. Some scanning equipment doesn't provide sound, though, so your sonographer may only show you your baby's heartbeat on the screen.