1 Aseptic meningitis is a term referring to the broad category of meningitis that is not caused by bacteria. 2  Approximately 50% of aseptic meningitis is due to viral infections. 3  Other less common causes include. 4  drug reactions or allergies,  inflammatory diseases like lupus.
The cycle will probably take you roughly 6-8 weeks, depending on the amount of dead stuff in the dry rock and the amount of dead life on the live rock that didn't survive shipping and handling by the time it gets back into saltwater. If the rock is really clean, it might be less than six weeks.
Tubes are like light bulbsâthey could go out at any time. Generally, if youâre playing hard, tube life can be anywhere from six months to a year, although weâve seen tubes last much longer than that. Preamp tubes can last indefinitely. Good quality tubes are the key to keeping your amplifier working great. Should you start to experience strange noises, microphonic squealing, hiss, or other strange and unwanted phenomena, check your preamp tubes.