Ive had my tabk up and running for about a year and a half now im using 6 t5 54 watt bulbs and all my levels are reading 0 and ph is reading 8.3. My problem is ive had a rbta for about 3 months now and it was doing great bubbled up and very colorful but now in the past 3 days it has pulled itself down into a hole and barley is visible to be its a hole at the top of my rocks. It still gets plenty of light and when I go to feed all my other nems it still eats just fine. Now today is the first day that it hasent really opened at all. Should I be worried or anything I plan on just leaving it alone for a lil while and seeing if it gets any better. If anyone has any info to provide I thank you very much.

