zoo question /problem

[techshredder]

so i bought a small zoo frag 4 days ago it was saturday when i got it.it has about 10 polups on it.the 1st 2 days they were all open looking good.yesterday when i put my lights on i noticed 6 of the 10 were open .now today there not opening all the way. my water parmeters are fine .i dose calcium thats it .my calicum reading is 420ppm.my lighting is pcs (stock biocube lighting.i have a korilla 1 powerhead for flow and the stock return pump.is this common on some days for them not to open or is this a problem any help or suggestions is appreciated thanks

[jenglish]

Zoos do go through periods of adjusment in a new tank, so it may be normal, but look very closely to see if you see any parasites and consider a dip, even if it is just a FW dip in case of external parasites

[techshredder]

ok cool thanks for the help

[jenglish]

Originally Posted by techshredder

ok cool thanks for the help

np, I have also had zoos that closed up and died after thriving for months with no reason that I could figure. Make sure they aren't in too direct of flow either. Let us know how it turns out.

[Loverotties]

Hope they're doing better.

[techshredder]

ok im updating my zoo situation .they were closed for like 3 days so yesterday i decided to give them a fresh water dip thinking maybe something is on on them.i put them back into tank still nothing .on some of the closed polyps there open a tad where you can see some color.for the most part there all closed tho im stumped.how do i know if there dead?maybe they need relocated in tank.i can
post a pic if need ed.right now there towards the lower part of tank because i didnt think they need a ton of light .....i have a korilla 1 powerhead located towards top of tank so is returnfrom the biocube is located on the other side of the tank.i also noticed the polyps start to open a little but then close back up after a little.suggestions please im new to coral thanks in advance