Has anyone used Balance Blocks and if so do you have an opinion if they work?  I believe they are made in Springville and are sold at a couple of fish stores here in Utah Valley, I bought some at Fish4U on Saturday also.  They are dissolvable blocks that you put in your tank.  They dissolve slowly and claim that they maintain a your Ph and also contain other supplents that are necessary.  They are very easy to use but I also wonder how good they really are.  I end up dosing on top of the blocks because I don't think they are sufficient but was wondering if anyone had used them and if they had any opinions.  Thanks!

There's a lot about this product that I don't like.  First, who knows what the block is made from?  Do you know if your tank needs that particular element?  There's no way, even if it the product works as advertised, that the dosage can be regulated.  I prefer to be in control and know what is being added to my tank water.

At first blush, I'd say at best it's no better then a handful of aragonite sand.  At worst, it could "poison" the tank.

Anyone have any opinions of HBH activated carbon?  The price is nice and the product "looks' and reads good. 

I wonder if HBH (located in Spingville) could be convinced to talk to the club about their products???  Maybe then they could explain what their balance blocks are made of and what benefits we might see from use of the product.  Give 'em a chance to tell me I'm full of crap .

Here is a  link to the balance blocks http://www.mops.on.ca/cgi-bin/SoftCart.exe/products/WTHB-30003.shtml?E+scstore - http://www.mops.on.ca/cgi-bin/SoftCart.exe/products/WTHB-300 03.shtml?E+scstore - but they just say that there are 71 vital trace minerals.  If you actually buy them they have a list on the packaging.  My system is just a 75 gallon reef.  I usually add calcium had been adding buffer but since I have been using the balance blocks (usually add a block with each water change) my Ph has stayed at 8.2.  I think the blocks are mostly buffer and then some low level additives - as Carl mentioned there is no way to control the dosage.  Thanks!

Here is another link

http://www.petsmart.com/products/product_10804.shtml?bfinfo=iPS_pet_supplies - http://www.petsmart.com/products/product_10804.shtml?bfinfo= iPS_pet_supplies

"Balance Blocks are a unique aquarium additive that replenishes calcium and a total of 71 trace minerals to salt water and reef aquariums. As Balance Blocks slowly dissolve on demand, vital elements are released into the aquarium and made bio-available for use by fish and the vast number of organisms present in a reef aquarium. Balance Blocks will help stabilize pH at an ocean level of 8.2 - 8.3. Tests have shown aquariums with the addition of Balance Blocks have improved development, health, and vitality. No marine aquarium should be without the micro-nutritive and replenishing effects of Balance Blocks."

A couple of interesting thoughts... what is the binding agent? Also, how does it stabalize the PH? What will happen to excess elements? Will they precipitate if the level is too high?