Dosing Pump Questions - Page 2

BlueTang<3 · #1 12-10-2010, 02:31 AM

Wow thanks i will look into a unit setting it up on a friends tank but if i like it i may scrap the reactor. Better control of the levels this way.

Any maintenance with the unit that one should be aware of.

spawn · #2 12-10-2010, 10:36 PM

Excellent post. Thanks to all for the info, as I am about to by my first doser.

Myka · #3 12-10-2010, 11:18 PM

I use two Drew's Dosers from BRS for calcium and alkalinity, these dosers don't back siphon at all. I have them each hooked up to a digital timer. I use the Fauna Marin balling salts. I dose magnesium into my water change water, and am now just noticing this isn't keeping up anymore, so I should buy a third doser. These dosers aren't as cool as the Profilux with all the digital fanciness, but they are reliable and are much more cost effective than the Profilum SA dosers. I was looking at Profilux, but decided on Drew's Dosers because I couldn't justify the extra cost.

When comparing how much each person doses, keep in mind that people use different concentrations. I mix up a 5 gallon pail of each solution that I keep sealed to prevent evaporation. I have 3.5 liter jugs attached to the dosers, and I just use the 5 gallon pails to fill them up. I dose about 80 mL of each solution per day split into 3 doses. Calcium during the day, and alkalinity at night.

I don't get any sort of crust on the ends of the tubing, the ends are out of the water. I hooked up these dosers in April I think, I haven't cleaned them yet, and it doesn't look like they need cleaning.

Oh, and the "chambers" are just expensive containers to hold the dosing solution. I use Rubbermaid containers with a small hole drilled in the top for the airline tubing.

phi delt reefer · #4 12-10-2010, 11:40 PM

+1 to Myka - get the drew's doser or the BRS two part ones (may go back on sale on boxing day to 69.99 each as per black friday so hold off if you can. I dont believe doser's can back siphon just given their design (liquid is pinched out in one direction) It's not a free flowing tube so its not like the return line in your tank. I am going to use some snazzy VOGA wine bottles i have laying around as dosing containers;

fishytime · #5 12-11-2010, 12:18 AM

All I have is a SA2.... Very easy to adjust

.....I needed very little MG so I couldnt justify the extra cost to dose that little bit of Mg.....in hindsight(and I know I can add a pump if I wanna) the third(or fourth) can be used to drip a steady stream of phyto or how bout this.....us Zeoheads could come up with a solution containing all the Zeo foods(Extra CV SP AA and CS).....and dose that 24 times a day

Myka · #6 12-11-2010, 12:22 AM

Quote:

Originally Posted by phi delt reefer

I dont believe doser's can back siphon just given their design (liquid is pinched out in one direction) It's not a free flowing tube so its not like the return line in your tank.

Some dosers will back-siphon because they use fewer rollers. Dosers should have 4 rollers to prevent back-siphon. Some only have 3. Drew's Dosers and Profilux both use 4 rollers.

lastlight · #7 12-11-2010, 02:46 AM

So I solved my crusty hose issue =)

I dose into my external overflow box and I had the outlets very close to the weir so water coming over it mixed with the dose. With the addition of the wavebox the water was actually washing over the pipe's end every now and then and this I think was causing the drip leftover at the end of the hose to skin over.