30 gallon Tank Questions

jachrist

Member
Hey there--

I have a 30 gallon tank that is using a Marineland HOB filter. I have one smaller powerhead on the opposite side of the water inlet from the filter and I do water changes every two-three weeks using reef crystals. I have two ocellaris clown fish, a couple damsels, and a CUC that consists of a cleaner shrimp, 15 snails, and a common starfish. The tank has 50lbs live sand and 30lbs of live rock.

Over the past four weeks, I've been adding an amount of coral. I have a handful of mushrooms, about 8 frags of zoas, and some anthelia. I also have a smaller frag of frogspawn and a hammer coral that a friend gave me. Most recently, I added a three inch frag of green goni to the tank.

Everything in the tank was doing great-- I made an auto-top off that keeps my tank consistently around 1.025 before I left for vacation.

Here's the problem-- before leaving, I noticed the goni wasn't doing too hot and feared it was getting too much light and direct flow. I moved it to the corner of a tank and fashioned a "hut" using some safe plastic. When I got back from vacation, both the hammer and the frogspawn frags were dead. They were located fairly close to the goni (each has ample room to avoid stinging). They were looking really healthy and melted away in less than four days. Does anybody have thoughts about what it could be? I don't dose with calcium, but fear that's a road I might need to take.

Thoughts on the next move for me? I understand they are harder corals to keep.
 
If you haven't dosed before I would recommend dosing 15ml of Kent essential elements per day with all these corals. I dose 5ml a day in a 10 gallon with the same types of corals and amount. You should also pick up the api calcium test kit and magnesium if you'd like. You can skip the dose the day you do you water change if you use reef crystals. Now ill explain why you only need to test for calcium if using this. This is because this bottle has the correct ratio of magnesium so if calcium is in check magnesium will be too.
 
That's another problem. I haven't had the chance to order the proper test kits. I've been utilizing the LFS to do tests, which I haven't done since adding the corals. I can only test for ammonia and PH right now, both which are at desired levels.
 
I had a couple euphyllia frags die out on me in a similar fashion. My calcium had been consistently around 350 and my KH around 150. They were not astronomically low, but they had been low consistently for about 6 weeks (the duration that I had them). They appeared fine, but were slowly dying, and by the time they showed symptoms it was too late to do anything. It was about 3 days from the time I noticed until they were fully dead. I would suggest at least doing regular testing to see if your levels are in check and then dose accordingly.
 
in a reef Alk is upmost important. You should pick up the test kit asap so tank can be checked. The cost of kits is money well spent.
 
I would not add or dose anything until you have the proper tests to verify your numbers. Just throwing things in the water is a good way to get yourself in trouble quick. just my two cents.
 
Everything has is coming back perfectly. The hammers and the frogspawn are starting to come back out of their skeleton and the purple digi is starting to show polyps again.

Tested everything today and all the parameters are perfect (calcium, alk, mag, and pH). They must have experienced a swing while the pieces of coral tanked.

Anybody else ever experience a swing like this and then have things recover so well?
 
Glad to hear everything is coming back. I have had some upsets in the past and recovered with minimal damage. IMO if we set up our tanks with a good foundation from the start and take it easy, then our tanks a more resilient than we give them credit. Stay calm,observe and act accordingly.
 
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