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you can use it to maintain your calcium. First get your parameters where you want them. Then wait exactly 24hrs or 48 hrs and measure again. See how much they dropped in 24 hrs. This is your consumption. You can then use the following calculator to figure out how much you need to drip to make up...

The controllable ones do have the same problem, but the way they control them is not to start and stop them, but to slow them down then speed them up.

Over on RC there was a few big threads about this testing company. Randy goes into depth about their testing methodologies and how a few of their tests are not as accurate and not the best method as they can be. If I am not mistaken, I think silica was one of them (I may be mistaken on this...

The problem with most threaded bulkheads is that they arent tapered threads like NPT is supposed to be. So getting a good seal requires a descent amount of pipe dope. The other problem with them is that they are prone to cracking when the pipe attaching to it is tightened too much. I will...

Unfortunately when I did that recipe, I had acquired 200 lbs of rock from a breakdown that had an extremely bad algae bloom from neglect. I am certain much of the bloom was bryopsis. There was no way it was going in my tank with the unknowns. Its now been in my tank for almost a year. Its...

No need to boil.... Use some 10:1 water to chlorine. Let it sit in that for a week. (this will break down a lot of the organics that boiling wont. Then let it sit out for about a week and dry, this will allow the chlorine to gas off. Then rinse off and use 10:1 water and vinegar. Let sit for a...

That is just the 12v AC pump. You still need the controller to even power it. http://www.amazon.com/Hydor-Koralia-Wavemaker-Controller-Controllable/dp/B001EUEB4G/ref=sr_1_126?ie=UTF8&s=home-garden&qid=1227896982&sr=1-126

All the prefilters should be changed at about the 6 month mark. Even if they look clean they can get stagnant. For the membrane and DI, you need to measure The TDS going in and coming out. The membrane will have a percentage rating. When you no longer get that rating, its time to change. For...

Second box is in.....in tandem they get about 3/8" wave going.....all my corals are opened up right now so you can see them all waving. When they are set to oppose each other, they counter each other and you get no wave. As you displace one, the other is taking in the displacement. As I figured...

Total of 3 inches on high. I am using the hydor controller. I can get it down to 2 seconds. I am waiting for a second box I made to dry now. So maybe with the two in tandem rather than opposing will give higher displacement.

So I ended up building a 5"x5"x12" box out of some acrylic I had laying around. Turns out my theory was right. Box fills just fine when the Koralia 12v is on low speed. The water level stays about an inch below the surface after it back fills. Unfortunately the pump isn't strong enough at the...

My theory is this. They claim at the 40hz it flows 500gph. The aperture of the pump is 1 3/4". So being say 10" under water, the aperture should be capable of flowing 1200gph - 1500gph. (just a rough guesstimate, haven't actually done the Bernoulli calculations). So the water pressure should...

I think tomorrow I am going to run to the dollar store and find a tupperware pitcher to use as a sudo wavebox for testing. Just cut a hole in it big enough for the Hydor. Then we'll know if the low speed on the pump is low enough to allow the back pressure to fill the wavebox. Should prove...

Just a comment. I think the 1/4" - 3/8" wave in the tank at the meeting was more than enough. It doesn't take much to get a wave going in our small bodies of water, just as long as it is consistent. Once it gets started, it wont take much to keep it moving. That's just law of physics. I also...

The amplitude did NOT change, only the frequency. It was a typical square wave going from +15 to -15. But I will comment it had a horrible ring to it and serious harmonic components. I will try to get a snap shot for you off the scope over the holiday weekend.

Sure you could, but the Hydors are ALOT cheaper!!!!! On the order of 4X cheaper. If you have the pump and driver for it, just use a scope and find out what they are driving it with.

Just to add.....so the rest of the world has this information, the Hydor Koralia 12v controllable pumps are NOT dc but they are ac. Hydor controls them with a variable frequency drive. The pumps are not made to be stopped then started. They are made to be slowed down then sped up. They feed the...

I think malulu, Oliver and I have a plan to further revise and simplify this. Looks like we may be able to get this to work with the much cheaper Hydor 12v pumps. If this is the case, this will be a very cheap wave solution. Stay Tuned.......... -Tom (not steve :P )

ok, after seeing your wavebox today I researched using a Hydor Koralia 4 12v. Turns out the Koralia is a pwm motor, so you need a driver. They have an auto shutoff built in at 100% duty cycle so they must be driven down to about 90%-95%. The pumps are cheap but the controller is expensive. But...

Heap the amount on the spoon, as you take the spoon out of the bottle, tilt the bottle and scrape the top of the spoon on the top edge of the opening of the bottle.