thelether is about 6 inches in the middle of the tank. total water vol. = about 400 gal.
I run rox as mentioned so think as well that is is the swing,
remembering, I last year had a shock where I tossed in 4 gallongs of stock solution of KH, making my tank a desert of fall down calcium.
this was about February I think, and with the swing this time I think this is where my proublem is,
I put a calendar op in my fish room, writhing each thing I do and what I mesure.
I will se if I can do some more fragging, and in this case I'm not going to risk making big frags, better 30 frags of 1/2 inch, than 5 of 3 inch and than the RTD takes them.
I did once a test to se how much you need to still be able to frag, and it was afew slises I made with a nife, and thy where 1/4 ore 1/5 of a inch, and still grew out to nice frags / coral.
meaning that in this case I might first frag only the tips of the coral, and than make frags of the base of the coral, if the base frags dont make it, I might have at least healthy tip frags.
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