Chalices receding, please help...calling on you experts as well!!

Catra2030

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Over the last two months or so a few of my chalices have started to recede from their rims inwards. The recession is very slow but as of late the number receding has increased. I have consulted M and M about this and he suggested to stop dosing for a while and keep up on regular water changes. I do not disagree, I'm just hesitant to take my hands off the wheel. Below is every aspect of my tank with pictures to follow when I get home from work.

Tank: 125 gallons 72x21x18, 40 gallon sump, total volume including displacement 130-135 gallons. Setup for 15 months, with corals for 13 months or so. Coral consist of mainly lps, a few softies.

Lighting: aquaticlife t5 72in 8 bulb (4 bulbs front to back) front to back, ati blue+, aquablue special, blue +, Fiji purple. Blues run from 930 am to 845 pm, highs from 11 am to 430 pm. I cut the highs back from 6.5 to 5.5 hours

Equipment: reef oct 200xs extreme skimmer, 2 mp40s set to nutrient transport mode, mag 12 for a return pump, RKL for temp control, ATO setup.

Dosing, etc: I run carbon and Seachem phosguard passively ( just ordered a MR1 reactor) in my filter socks, dosing is Seachem reef fusion 2 part dosed by parastalic dosers, 40 ml of kh a day split into 6 dosing times, and Ca dosed at 40 ml a day at three dosing times. Both supplements are mixed with RODI and dosed as a solution. Both are separated by a minimum of 1.5 hours, controlled by my RKL. I also dose Mg at the moment in an attempt to battle a small amount of bryopsis. I do not does lugols or any other supplement/additive.

Inhabitants: kole tang, mystery wrasse, damsel (jerk), clean up crew of margarita snails, scarlet hermits, turbo snails. Corals, mainly lps...favias, plates, chalices, wellsos. Softies include a few zoas and palys, and a toadstool mushroom.

Parameters: temp 78.5 constant, as of 9:15ast night, kh 9.3, ca 420, Mg 1500, phosphates 0.08, ph 8.0-8.2, salinity 1.0255 hydrometer, potassium tested 3 weeks ago 400 ppm. Havent tested I2 or strontium or anything else. Last water change was last Sunday.

Other important notes: redid the tank 2 weeks ago, removed old sand bed and replaced with a shallower .75 in sandbed of caribsea dry argonite special grade sand.

Next post will have my thoughts, thank you for reading and I'll get the pictures up ASAP.
 
I forgot a few things, amm 0, nitrites 0 and nitrates 0.

Here are a few thoughts as to what's causing this recession.
1. Water quality, not running carbon or phosphate media in a reactor.
2. My toadstool mushroom, it closes during the vortechs pulsing phase and opens when they run in the constant phase, it just started lately, but maybe that process is releasing chemicals and the toadstool is the issue, which carbon would help.
3. Lighting, maybe the blues are on too long, maybe I need to switch out the Fiji purple for another aquablue or blue+? I've read that the par ratings for the blue+ bulbs are more than the actual readings. I did add the blue+ bulbs back in late August. Lighting, sand to bottom of lights: 26.75", top of corals on sand to lights 25.75 inches, lights to water 3.75 inches.
4. ME, maybe I'm the problem, maybe I dose too much and need to follow M and M's advice and let the tank reach its own equilibrium.
5. Maybe I need to look into things like I2 and strontium, this idea is a left field idea, just throwing it out there.
 
Yes, had this issue before I swapped it, but it was only evident on 3-4 chalices, now it's evident on 7 chalices. Everything else is fine and all corals are accepting foods and feeding regularly. I'll have some pics up, I'm doing this on my phone at the moment, slow process. Thanks for the reply.
 
The only time I've had problems with chalices (same as you're describing) is when I had high PO4.
 
http://i1090.photobucket.com/albums/i369/Catra2030/IMG_0542.jpg

Rainbow delight

http://i1090.photobucket.com/albums/i369/Catra2030/IMG_0540.jpg

Watermelon...recovering slowly actually, looked worse a week ago

http://i1090.photobucket.com/albums/i369/Catra2030/IMG_0539.jpg

My Miami, one of my prized pieces personally.

http://i1090.photobucket.com/albums/i369/Catra2030/IMG_0538.jpg

Miami hurricane, it's been like this for 2 months, no change.

http://i1090.photobucket.com/albums/i369/Catra2030/IMG_0537.jpg

Bubblegum monster, just started about Monday.

Best I can do guys until I get onto my computer, I also agree, this could be attributed to the change in sand as well as my phosphates, I just can't get them under 0.08-0.04, hopefully the reactor will change that.
 
Looking at the receding pattern I feel it might have to do with not enough nutrients. I had the same situation and with increased feeding they have made a come back for me.
 
Thanks firsttime, I've stepped up the feeding, which leads me to another comment, always seem to forget details. I feed about 2-3 times a week as of late, mainly mysis shrimp and phytofeast. Does anyone think I should back down to say brine shrimp instead of mysis. Or is there something else worth looking at, say fauna Maurin lps food? Also, I spot feed after lights out with skimmer off and flow near nothing for about 30 minutes.
 
well changing the sandbed should of stirred up alot of nutrients......my guess would be an alk swing......have you tested in the morning and evening ????....i would say keep up with the mysis and also try the pellets
 
I have alk dosing around the clock, the way it's laid out, each day I have 180 ml of all solution dosing, 42 ml of that is alk and 138 ml is rodi, dosed 6 times a day, at 12am, 4 am, 8 am, 12pm 4pm and 8pm, each dose is 8ml all and 22ml rodi. I've tested as late as 11pm but never any earlier than lunch time.

I see what your saying though, is it possible I'm getting a night time swing? I'll have to check on that. It's just weird that this started before the redo and has continued. But I'm considering everything as a pitential factor right now.
 
Thanks firsttime, I've stepped up the feeding, which leads me to another comment, always seem to forget details. I feed about 2-3 times a week as of late, mainly mysis shrimp and phytofeast. Does anyone think I should back down to say brine shrimp instead of mysis. Or is there something else worth looking at, say fauna Maurin lps food? Also, I spot feed after lights out with skimmer off and flow near nothing for about 30 minutes.

I'd feed cycopsese instead. Chalices have small mouths.
 
Perfect, thanks for the reply murfman, I'm making a trip to the store tonight, on the list.

On a side note, after tonights trip, I'll have the following on hand.
-coral rx, brightwells coralcare, lugols.
-red sea amino acids program, brightwells amino acids, phytofeast, mysis and cyclopeeze, and I'll pick up some brine while I'm at it.
 
Just wanted to post an update as to how things are going. As of now, all chalices showing signs of recession have been through a Lugols dip. So far any further recession is not evident, but then again in the past, the recession has been very very slow and I'm sure by the end of the week when I compare pics I'll know how things are really going.

I am wondering if I should cut away the exposed skeleton or if I should leave it alone??? Also, I have tested everything over the past few days, below are the results

Sat. Night
Temp 78.5, pH 8.0-8.2, Ca 410, Kh-9.3, Mg 1560, Strontium 4, Salinity 1.026, PO4 0.08

Sun
Temp 78.5, pH 8.0-8.2, Ca 400-410, Kh 9.3, Mg 1530, Strontium 4, Salinity 1.026, PO4 0.08

Monday Night
All tests were the same

All testing was performed just before alkalinity dosed
 
I would leave the skeleton alone. How much flow are the chalices getting? I had recession in a few of my chalices that stopped immediately when I moved them to lower light and lower flow.
 
Phosphates are a tad high man.. Are you running a Gfo or anything?? I always tried to keep my tank at .03 or below which is possible with the right amount of feeding and right foods... Also how are you testing your po4?
 
Looking at the receding pattern I feel it might have to do with not enough nutrients. I had the same situation and with increased feeding they have made a come back for me.

Recently talking to a friend with the exact same issue and advised him to feed the tank a little more (including semi-regular spot feedings) and his chalices bounced back with a vengeance and have been growing nicely ever since
 

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