300 gallon stingray/shark tank update - and ideas needed

klwheat

New member
As some of you all may remember, about a year ago I started a 300ish gallon tank system with a California round stingray, an Australian marbled catshark, and a couple other fish. We went into this know that we were going to need major filtration. So, here goes the update. The equipment is a 252 gallon custom-shaped tank courtesy of Polly's Pets (thank you Steven and Randy and all!). A ruby elite 36" refugium/sump, SRO-5000sss skimmer, and various pumps and powerheads. Lighting is by 2 ecotech radions (love the programmability). It has about 1.5-2" fine sand bed, a decent amount of macroalgae in the fuge, and about 180lbs of live rock between the sump and tank. Now, I know (now) that this is not enough rock for the tank/waste that needed to be managed, but I didn't want to take up any more room that the ray needed. So, after dealing with high nitrates (and I mean HIGH!) with water changes, I purchased a precision marine media reactor for biopellets. After 5 weeks, I had nearly given up hope. My nitrates were well above 100 when I installed it. I also did a 200 gallon water change (what a chore!) to get it back down. After 5 weeks, nitrates were back up to 100 again! I worked very "off" shifts this last week and didn't have much time to do anything other than adjust the reactor for better biopellet tumbling/flow. Then, suddenly this last Thursday, it looked like all of the coral/xenia in the tank were dying! (yes, they had actually been doing reasonably well until then). I knew that this was because of my out of control nitrates and was becoming frantic about doing another huge water change. Just to check before the change, I retested all my water parameters. Imagine my amazement when my nitrates were <10! After 1 more week, and better reactor flow, my nitrates had PLUMMETED! Now, I'm just waiting for everything to adjust. I started the biopellets with just a 1/2 cup, and added slowly each week, but it all of a sudden seemed to work. Not how I had anticipated..but my nitrates are actually down! Just wanted to let everyone know about my experience with biopellets. I even took the water to Polly's Pets to have them test it again because even after 2 tests of my own, I didn't believe it.
You can check out the live feed of the tank now at:
http://wheatstingraycam.viewnetcam.com/CgiStart?page=Single&Language=0
the user name is: wheatstingray
the password is: stingray
 
So, now on to the ideas needed portion. I'm going to wait a couple of weeks for things to settle and make sure all is good. After that, I'm looking to expand my tank's population. Current stocking is an 8" or so California round stingray, a 12" or so Australian marbled cat shark, a 4-5" Harlequin tusk, a 6" magnificent foxface, a 6" sailfin tang, and a 2.5" tomato clown. There is also a small carpet anemone that I couldn't remove (all other corals were moved to my 90 gallon tank when I was afraid they were dying in there). I would like to add a larger anemone for the tomato clown. I'm looking for suggestions for other tankmates. The tank is 6' long and 3-3.5' wide depending on the part of the tank you measure. Thanks for the help!
 
you must have just missed her...lol She's usually very active in the am. The shark is almost never on the cam unless you happen to watch during feeding time, and even then only if she comes out on THAT side of the rock. The ray is often just swimming laps in there. I'm thinking of adding either a large lionfish or porcupine puffer next
 
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