Best SPS Tank Substrate Choices (or lack thereof)

jroovers

New member
Just thought I'd start a new thread on this topic as I've been debating what to do with my tank when starting back up. I had about a 2" floor of Seafloor Special originally in my 120, but found it got blasted around a bit too much. I swapped it out for about 2" of Florida Crushed Coral, which stayed in place much better, and seemed to support a great pod population in addition to being relatively easy to vacuum. I am tempted to go BB with my next set-up, but aesthetically it isn't as pleasing. Anyhow, happy to hear input from everyone to help sway my decision making.
 
I have a 1" mix of CC and reef grade 1-3mm in my reef. It stays put in high flow but stills a allows snails and worms to burrow through sand. I think it looks cool also :)
 
I have a layer of about 2inches of fine oolite and .5 inch layer of 1.5-2mm aragonite. This allows my wrasses to bury in the fine stuff but keeps it from blowing. I also let the sand establish for 2 months before i turned cranked up the flow to insane:bounce1:
 
I vote for none. Any sand bed will collect detritus. I have done deep and shallow sand beds in the past. Bare bottom is much easier.
 
I have a 1" mix of CC and reef grade 1-3mm in my reef. It stays put in high flow but stills a allows snails and worms to burrow through sand. I think it looks cool also :)

Never thought of that combo but it makes sense. Do you vacuum it? If so, does the top layer of CC eventually mix in with the sand though? I don't plan on having anything more than a shallow sand bed, and would want to be able to vacuum it.

I have a layer of about 2inches of fine oolite and .5 inch layer of 1.5-2mm aragonite. This allows my wrasses to bury in the fine stuff but keeps it from blowing. I also let the sand establish for 2 months before i turned cranked up the flow to insane:bounce1:

I'm surprised that it doesn't blow around after a while... I'm assuming you don't vacuum this bed?

I have close to a 4" DSB of Seafloor Special now and love it lol

I don't think I'll go back to the seafloor special. It was ok for a while, but then it got pretty disgusting. 4" is quite a bit - I'm guessing if you are using it as a DSB that you are doing your best to not disturb it, and not vacuum it.

Have done DSB for years but after being in hobby for almost 15 years I'm now sand less growing weeds of corals. Here is a pic under kessils and bare bottom. Also cut out water changes.
View attachment 294323

I won't do a DSB in tank again. Did that with my first tank, a 55 gallon, and after a year and a bit I started developing issues with nitrates. Can't argue with your pic! I definitely see the value of being BB and being able to clear out the detritus as needed. But still don't think it looks as nice, and leaves less habitat for pods and other small organisms potentially.

I vote for none. Any sand bed will collect detritus. I have done deep and shallow sand beds in the past. Bare bottom is much easier.

Sandless here too and loving it!!!!

Yes, the appeal of lower maintenance with the BB compared to a sandbed is compelling!
 
I use the Starboard cutting board for my BB tank and love the way it looks. I don't like the way tanks look with BB only. This also protects the BB glass from being damaged by falling rocks, etc...
 
Jordan, I would do shallow sand bed. I've done both bare bottom and sanded (had bare bottomed tank only few months ago..) and whilst both have their pros and cons, ultimately, the aesthetics win in the end.

Bare bottom: nutrient control is so easy...at one point my tanks glass didnt need to be wiped for WEEKS...only coralline grew on the glass.

Shallow sand bed: fairly easy to maintain, and if you plan to siphon it from the start it will be fine.

As for sand type/brand: If you can source Tropic Eden in Canada, then I'd get that. I like to read lots of build threads and I can tell you that everyone praises this sand for being clean and not being affected too much by pumps etc.

I've always used Caribsea Seaflor Special, but found it pretty dirty...so since I couldnt find any Tropic Eden in the UK, I bought TMC Aragonite 1-3mm sand and this stuff is pretty clean.

If you do go bare bottomed, be prepared to use a lot of flow and possibly more pumps than you would otherwise use, in order to get the detritus to stay suspended and not sit all over the bottom. Or get direct your flow in such a way that detritus collects in an easily accessible corner so it can be siphoned out easily (although this is not a good thing if left too long).
 
I use CaribSea Seaflor Special Grade Reef Sand, it allows my wrasses to burrow and my MP40s to operate at 100%
 
I've never had sand. My SPS growth far surpasses my expectations.

Just remember, you can always create ground cover with:

- chalices
- montis (amazingly, my montis grow really fast)
- leptos
- zoas (not so easy)
- coraline (depending on your setup)
- plating sps (not as practical but i've done a huge red planet colony to great success)
- GSP (It will collect detritus for you and you can't see the detritus until you suck the detritus out, like a natural trap that can easily be cleaned. I love my little patch, grows fast and easy to trim back)

I would love sand, but I'm way too lazy to maintain it.
 
I use special grade as well, I like the size and the ability to easily vac it when I feel the need to remove some extra detritus.
 
I have several acans on the bottom and would like a plate or two. Put some corals on the bare bottom and it does not look so bare. I go for the adjust flow to have it pile up in one spot. I am not having much luck with this tank tho. I am having a hard time finding the proper pump placement to get it to pile up not under my rocks.
 
I use the Starboard cutting board for my BB tank and love the way it looks. I don't like the way tanks look with BB only. This also protects the BB glass from being damaged by falling rocks, etc...

I'm seriously thinking of giving this a go. Where did you get your board from? How long have you had it? Does it get dirty looking after a while? I wonder if the board would be actually better for coralline growth as well - the coralline seems to grow better on my acrylic overflow piece in my tank compared to the back glass.

2-3" cleaned slowly every few years.

That is what I have done in the past, but more regular cleaning.

Jordan, I would do shallow sand bed. I've done both bare bottom and sanded (had bare bottomed tank only few months ago..) and whilst both have their pros and cons, ultimately, the aesthetics win in the end.

Bare bottom: nutrient control is so easy...at one point my tanks glass didnt need to be wiped for WEEKS...only coralline grew on the glass.

Shallow sand bed: fairly easy to maintain, and if you plan to siphon it from the start it will be fine.

As for sand type/brand: If you can source Tropic Eden in Canada, then I'd get that. I like to read lots of build threads and I can tell you that everyone praises this sand for being clean and not being affected too much by pumps etc.

I've always used Caribsea Seaflor Special, but found it pretty dirty...so since I couldnt find any Tropic Eden in the UK, I bought TMC Aragonite 1-3mm sand and this stuff is pretty clean.

If you do go bare bottomed, be prepared to use a lot of flow and possibly more pumps than you would otherwise use, in order to get the detritus to stay suspended and not sit all over the bottom. Or get direct your flow in such a way that detritus collects in an easily accessible corner so it can be siphoned out easily (although this is not a good thing if left too long).

Thanks for this Sahin. I will check out the Tropic Eden. Pros and cons to both, decisions decisions! I may go with BB or board just to try it. I've had a DSB and a SSB in a display, but never BB.

Tanks look so odd without sand on the bottom.

I would opt with just a small .5inch layer and some type of bristle star.

That is the mental hurdle that I can't quite get over re: going BB.

I use CaribSea Seaflor Special Grade Reef Sand, it allows my wrasses to burrow and my MP40s to operate at 100%

Yes, going BB or to board would potentially limit fish selection.

I've never had sand. My SPS growth far surpasses my expectations.

Just remember, you can always create ground cover with:

- chalices
- montis (amazingly, my montis grow really fast)
- leptos
- zoas (not so easy)
- coraline (depending on your setup)
- plating sps (not as practical but i've done a huge red planet colony to great success)
- GSP (It will collect detritus for you and you can't see the detritus until you suck the detritus out, like a natural trap that can easily be cleaned. I love my little patch, grows fast and easy to trim back)

I would love sand, but I'm way too lazy to maintain it.

A GSP "lawn" would look amazing, but would be near impossible to control over the long term (it would eventually encroach on rocks and other corals potentially). I like the thought of less maintenance than with a sand bed if I can get the detritus to collect in one spot and it can be siphoned out.

I use special grade as well, I like the size and the ability to easily vac it when I feel the need to remove some extra detritus.

How deep do you have it? I think It is best in the 1.5" to 2" range.

I have several acans on the bottom and would like a plate or two. Put some corals on the bare bottom and it does not look so bare. I go for the adjust flow to have it pile up in one spot. I am not having much luck with this tank tho. I am having a hard time finding the proper pump placement to get it to pile up not under my rocks.

That is a possible issue. Does the detritus look unsightly, or is it simply hidden under the rocks?
 
Does the brittle star's and other creatures not keep the sand clean enough? I would think they keep the sand spotless...

How do you 'clean' your sand and how often should I being doing this?
 
Never thought of that combo but it makes sense. Do you vacuum it? If so, does the top layer of CC eventually mix in with the sand though? I don't plan on having anything more than a shallow sand bed, and would want to be able to vacuum it.

I mixed it up initially when I put it in. I have never vacuumed it. I have lots of spaghetti worms and feather dusters growing. I like having the life in there, and with all the flow nothing really settles anyway. I ran a BB 120 in the past but IMO the more surface area for bacteria to grow, the more stable a system becomes. Especially with minimalist scapes becoming so popular, I see even more of a need for sand, not DSB though :fun2: JMO based on my experience.
 
Does the brittle star's and other creatures not keep the sand clean enough? I would think they keep the sand spotless...

How do you 'clean' your sand and how often should I being doing this?

Everything produces waste, so the sand eventually fills up with waste. The beauty of bare bottom is you can see the waste and remove it.

How deep do you have it? I think It is best in the 1.5" to 2" range.

I'm in right about 2 inches. A little deeper than I'd like it so I will most likely be removing some when I vac it. If I vac it. I can't say I'm overly concerned about the sandbed at the moment. I moved 10 cups of the most active sand I could find from my smaller tank when I built my 150 and heavy feeding has resulted in the sandbed quickly populating with all kinds of life.
 
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