Gary Majchrzak
Team RC
Dosing
- Thread starter gandolf8
- Start date
Gary Majchrzak
Team RC
I didn't knock anything. Merely told you what I would do 
There is nothing in the kalk or 2 part that would reduce sg/salinity.
I won't knock your equipment but question why it's hard to keep sg at 1.025 with it; it's supposed to monitor and replenish salt levels to a preset level. Maybe one of the monitors or probes has gone bad. Do you replace all those probes annually as recommended with the company's $130 probes. Aee the $500 membranes replaced annually; if not malfunction could easily account for salinity drops.
If it doesn't sense sg and replace salts lost through the membranes ,the salt water will turn fresh overtime as interacts with ro/di water through the membranes .Not only nitrate and phosphate ammonia and other undesirable solutes are removed; all solutes are removed including things like: sodium ,chloride , potassium, calcium, carbonate , magnesium, et alia ) . It is essentially a partial ro/di treatment for salt water passing by the membranes.
I read about it years ago,chose not to use it. $3000 up front and $ 800 per year for membranes ,probes, etc for ro/di osmosis filtering of a gallon per day of water was too much for me . Their salt was very pricey too. It also seemed too many things could o wrong with a system reliant on ph probes, orp probes, conductivity probes and seven or so membranes, pumps etc.
. Besides ,even if it worked perfectly ,treating a small a small percentage of the water in a system isn't going to have a major impact on overall nutrient levels.
Sg will fall a little from time to time in some tanks without dialyseas (which depletes it and relies on a conductivity monitor to regulate replacement) from salt creep and salt mist but not much and not often and certainly not when you are adding extra chloride and sodium from the two part.
I won't knock your equipment but question why it's hard to keep sg at 1.025 with it; it's supposed to monitor and replenish salt levels to a preset level. Maybe one of the monitors or probes has gone bad. Do you replace all those probes annually as recommended with the company's $130 probes. Aee the $500 membranes replaced annually; if not malfunction could easily account for salinity drops.
If it doesn't sense sg and replace salts lost through the membranes ,the salt water will turn fresh overtime as interacts with ro/di water through the membranes .Not only nitrate and phosphate ammonia and other undesirable solutes are removed; all solutes are removed including things like: sodium ,chloride , potassium, calcium, carbonate , magnesium, et alia ) . It is essentially a partial ro/di treatment for salt water passing by the membranes.
I read about it years ago,chose not to use it. $3000 up front and $ 800 per year for membranes ,probes, etc for ro/di osmosis filtering of a gallon per day of water was too much for me . Their salt was very pricey too. It also seemed too many things could o wrong with a system reliant on ph probes, orp probes, conductivity probes and seven or so membranes, pumps etc.
. Besides ,even if it worked perfectly ,treating a small a small percentage of the water in a system isn't going to have a major impact on overall nutrient levels.
Sg will fall a little from time to time in some tanks without dialyseas (which depletes it and relies on a conductivity monitor to regulate replacement) from salt creep and salt mist but not much and not often and certainly not when you are adding extra chloride and sodium from the two part.
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well the machine cost 2300 and I don't know were you got 800 dollars a yr. The membrane is for the R/O unit which I can buy any were and the conductivity prob is 155. This unit only does salt and nothing else had unit 2011 and had no problem at all with it unit till now if that is what is doing it.
Well the price must have dropped since I looked into it. I was $3,000 for the euipment ,actually $2990 plus tax, and $ 800 for the annual maintenance replacement costs as I stated.
There is more in this this product review from 2002 which explains the system and measures some outcomes and costs for those who would like to know:
<cite>reefkeeping.com/issues/2006-04/pr/index.php</cite>
This is from it:
I.4 How Much Does it Cost to Purchase?
<hr align="left" color="#006699" size="1px" width="75%">I paid $2990 in November of 2002 for the full-sized unit, version 6.59, including the pH and ORP electronics cards and shipping. That price included all components necessary for start-up.
and this:
..."consumables" must be replaced periodically: ...
Seavisions suggests that the probes should be replaced yearly, which costs: pH ($130), ORP ($130), conductivity ($108).....Seavisions further recommends that the membranes should be changed yearly or sooner depending upon use, but the criteria for judging if a given membrane is spent, the dialysis membrane excepted, are not clear to me. The manual does provide a measurable criterion for judging when the dialysis membrane should be replaced. It costs about $230 to replace all seven membranes. So, following Seavisions' recommended maintenance schedule would cost about $763/yr.
and then extra costs for extra magnesium, calcium and alkainity removed by the process.
So that's where I got $800 which is probably low side.
There is more in this this product review from 2002 which explains the system and measures some outcomes and costs for those who would like to know:
<cite>reefkeeping.com/issues/2006-04/pr/index.php</cite>
This is from it:
I.4 How Much Does it Cost to Purchase?
<hr align="left" color="#006699" size="1px" width="75%">I paid $2990 in November of 2002 for the full-sized unit, version 6.59, including the pH and ORP electronics cards and shipping. That price included all components necessary for start-up.
and this:
..."consumables" must be replaced periodically: ...
Seavisions suggests that the probes should be replaced yearly, which costs: pH ($130), ORP ($130), conductivity ($108).....Seavisions further recommends that the membranes should be changed yearly or sooner depending upon use, but the criteria for judging if a given membrane is spent, the dialysis membrane excepted, are not clear to me. The manual does provide a measurable criterion for judging when the dialysis membrane should be replaced. It costs about $230 to replace all seven membranes. So, following Seavisions' recommended maintenance schedule would cost about $763/yr.
and then extra costs for extra magnesium, calcium and alkainity removed by the process.
So that's where I got $800 which is probably low side.
See I don't use the magnesium, calcium and alkainity . I also only have one membrane and that is for the R/O unit .so for all the filters are 70 dollars all depends on membrane. The conductivity probe is 150 so I don't thing this is bad at all .Is the machine prefect no it isn't, but if it works like this one has them find my me.
reefboarder
Intelligent Donkey
As Gary started to say in an earlier post, if you are replacing skimmate with r/o water or Kalkwasser that will slowly lower salinity if you are going longer durations between water changes.
I your fresh mixed asw is only 1.023 then that's likely why your salinity is low.
Reef aquariums should be in between 1.025 and 1.026 for the health of the corals. So making sure new salt water is at least 1.025 would likely remedy your low salinity issues.
I your fresh mixed asw is only 1.023 then that's likely why your salinity is low.
Reef aquariums should be in between 1.025 and 1.026 for the health of the corals. So making sure new salt water is at least 1.025 would likely remedy your low salinity issues.
