I recently put my 75 gal reef tank back up after a few years and it is mid cycle. Ammonia is down now but nitrites are still elevated and nitrates are off the charts high. I need to make a trip to get some water from my lfs but its about 40 mins away(I am planning on my own RO/DI unit soon). I was hoping to be able to get some chaeto for my refugium while I'm there but I wasn't sure if these levels might kill it. I know it consumes nitrate but mine is sooo high. I don't want to interrupt the cycle by changing water before nitrites drop and the lfs is only open Fri sat and sun so I was going to get the water to have it on hand. If I can I'd like to avoid a second trip for a $10 bag of macroalgae.