The water treatment was due for me.  Chesnuts seem to do well no matter what.  Upon cleaning my huge tub of water I noticed the UV light stopped working.  Not sure when. Cleaned all parts pretty well and bought 25 gallons of distilled h2o looking like the crazy dude at market basket.  Should be good for this month until I get a water treatment filter apparatus. Rocking well water and oysters seem to not like it whatsoever