Sea Lab #28 Automatic Replenisher

[jefftse]

Have anyone used them before?

 

Is it worthy?

 

http://www.petmountain.com/product/molybdenum-and-strontium-supplements/11442-575275/sea-lab-sea-lab-28-automatic-replenisher-24-large-blocks.html

[jefftse]

wow no one?

[Origami]

Nope. And don't believe that it will give you "controlled" in dosing in response to low levels. The block slowly dissolves and will either under or overdose depending only on this. It's open loop, not closed loop dosing.

[davelin315]

I used them long ago and noticed that they dissolved very quickly despite demand if they were in higher flow. I then put them in one of those breeder cages (the plastic ones with the holes in the bottom) so that they got very passive flow and noticed that they dissolved and left behind chunks of undissolved block instead of wearing away consistently. I am unsure if they worked at all and have used them in school tanks periodically since I don't dose much at all in many of those but have never noticed that they keep anything more stable as far as levels - not many test for all of the things they state they have in them and as Tom said, it's probably impossible to create a block that will dissolve only as needed since you really can't design a solid to dissolve only when the solvent around it is deficient in a specific compound that's not at saturation - at least not at the price of the blocks!

[jefftse]

made sense.. I just thought it's a cheap solution and it had "good reviews"

[treesprite]

I've never used it, but don't believe it reading the ad. It wold have to be able to tell when each individual thing is low, and only dissolve out that particular component if the others are not low. Or every one of those things would have to be low at the same time, otherwise the ones that are not low will get overdosed.