dsb ?s

robertnb64

Member
Hey Anthony,

1st I have to say I loved your book and can't wait for the new book.

Here's my situation, I hope you can help. My tank now is a year old. It's a 110 gal, sump with no mech filter, a skimmer top fathom 100 ( I read were you wouldn't take one for free and I can see why). I consistantly get 4-6 oz of skimmate daily that is weak tea colored. I rotate 2 carbon bags every week. I have 125# of lr that was super purple with coralline algae. My sand bed set up by the lfs is 4" of coarse grade cc and 1.5" of medium grade sand. My sump return is a Rio 3500 at 4' and my closed loop is with a Little Giant 3MDQ at 4'. At about the 8 month mark I developed cyno. I cut my feeding from a single prime reef daily to a 1/2 cube every other day and increased my water changes from 10-15 gal every other week to 15 gal twice a week. I use ro/di with filters changed every 6 months and reef crystals salt. After about 3 weeks the cyno was gone and dino's took there place. Now my entire tank is covered with this goo. I have tried siphoning it off, using a tooth brush with my twice weekly water changes and I can't stay on top of it. I now the problem is my nutrients are out of balance. My Am, Ni, Na, Si, Phos are 0, my ph is 8.15 as a low and 8.4 as a high. 1.025, 79 deg. ORP 375. In my mind I have narrowed my weakness to a weak skimmer (though I am getting a fair amount daily) or a poorly designed sand bed. I have chosen to replace my sand bed with 5-6" of sugar fine sand. Do you feel this is my best course of action? Here is my plan, 1st I have put about 15# of the new dead sand in my small 20 gal tank in plastic containers to seed them with bacteria. I also placed some of the lr from the display tank on the sand hoping to seed live creatures in this sand. I will wait about 3-4 weeks here then drain the display and remove the old sand and clean both the tank and the lr. I will clean the lr in tank water that is heated to preserve life. I will put the new dead sand in to depth and place the seeded sand on top. I will then replace some of the lr the further seed the tank and leave it for 4 weeks the cycle the new sand. Is this wise? Will the remaing lr be enough filtration in my 20 gal rubbermaid cont that will house my fish for the 4 weeks(with a heater and powerhear)? Should I use any of my old sand with the new sand? If so should I mix it in with the fine sand or place on top? Anthoney, thank you for your thoughts and sorry for the lengthy post.
 
Cheers, Robert :)

Thanks kindly for the kudos on BOCP1... and the printer has scheduled delivery of our new book in the next 2 weeks (tentative Friday 13th... how cool is that!?!)

Regarding the nutrient and nuisance algae condition... you are right on the mark, my friend. I agree completely... the weak skimmate hurts and the misapplied sand bed isn't helping (coarse is bad IMO and mixed grains are worse... and 4" is too shallow with all coarse just the same).

To rid the dinoflaggellates sooner/in general... you'll want to get that pH up higher. Its rather flat. Especially with nuisance algae, aim for near 8.6 by day, and no lower than 8.3 by night. Some folks go even higher (slowly if so, please). Keep up the high redox/ORP at the same time. 375mv is just fine... no need to go much higher.

I would not be so worried about a slow transition to the new dsb. Your present mixed bed seems to be more harm than help as a nutrient sink. Do consider a complete swap. And do add a little (few cups is fine) of your old sand to seed the new. Interestingly, after a good rinse in saltwater, you might re-use your old sand in a much smaller tank (at much greater depth) as a place of refugia (keep it fishless and encourage more microfauna... good current too to prevent excess sedimentation).

You may only need to keep your livestock separated for just a few days (not more than a week) for the tank to settle down after the live sand swap. Some of the tricks to preventing cloudiness with new sugar fine sand are to soak the sand in advance, do not rinse (leave the fine matter for better buffering/bio-minerals in the long run) and be sure not to disturb the sand when refilling (pump water into a large bucket sitting in the tank with a slow feed/spill over).

Whew! Have I missed anything? I'm getting old :p

Kind regards,

Anthony
 
Anthony,

Thank you so much for the quick and thorough reply, you are awesome :D

Just to press further on the issue of leaving the fish out, you mention only a couple of days is fine. I was thinking in terms of a few weeks to allow more sand fauna to devolop. I have a manderian goby. Is my plan of a few weeks necessary or a few day good enough.

Thanks again, Robert

PS any chance you will be speaking on the west coast?
 
Always welcome, my friend :)

And yes... indeed, leaving the fish out would be excellent for the development of microfauna. My apologies, I thought you were concerend about water quality or disturbance of nitrifying faculties with the transfer.

If you can maintain good water quality for the livestock in the temporary housing, a few weeks or longer might be nice. Although in the big picture... it will not be a tremendous advantage. Much more to be gained from a large fishless refugium over time (jammed with Chaetomorpha, for example, for massive amphipod culture).

As far as the trip out to the West coast... indeed a few things on the table. Have chatted with the Bay Area folks, Colorado and Washington state... will likely visit in the next 6 months or so.

Will be in San Diego and LA in a couple weeks for the new book release, but no club meetings.

Do peek in on us at Wetwebmedia.com (check the daily FAQ page or the events link)... or visit the "authors" link on readingtrees.com

Would love to meet you and share a beer/chat.

Best regards,

Anthony
 
Anthony,

Thanks again for your help. I alway enjoy the unselfish help you and others give both at wetwebmedia and reefcentral.

I live in the LA area and would love to buy you a beer and chat. I know you will have limeted time and alot of books to sign:eek1:

Anyway thanks again and happy signing.
 
Robert...

if you are not already involved, do look into participating in the LA club MASLAC.

One of our good friends and WWM crew mentors is active there: Scott Fellman.

We'll be looking Scott up once in LA to meet for some Tommy burgers :p or another similar health food :D Perhaps you can join us then?

Best regards,

Anthony
 
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