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rohnds

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Everything posted by rohnds

  1. Sorry about the confusion. I am truly interested in the elongated Xenia (whatever is left) and all the inverts. Rohn
  2. I am biased since I graduated from Rutgers. I don't think anyone in this country really think that they are that great and that is why until recently (Louisville game) they were ranked out of the top ten even though they were unbeaten. The only way to assess who deserve a championship game is to get rid of the profit making BCS bowl games and set up play off system like every other collegiate sport. Rohn
  3. Please confirm that you received my ph #. I PMed it to you earlier. You can either post the address or PM it individually. Thanks for making this happen. Rohn
  4. This Friday works GREAT for me ... Like I said, make the delivery on a Wed, Thurs or Fri and I will pick them up in less than 20min so yo wouldn't have to go through the hassle of acclimation. Mon and Tue are out of the question. On Sat and Sun I could get my wife to pick them up. Identical msg PM'ed, except for my ph #. Rohn
  5. rohnds

    Reeftopia

    Add 1 Condylactus Anemone and 1 royal gamma Rohn
  6. No ... except to say that the pH rises during the day and decline during the night. pH changes becomes more drastic at higher temperatures than lower. Therefore, ideally you want to do your water changes during the evening or night. But then this going overboard with water chemistry. As aquarists, a small changes in pH would not cause any harm to your fish ... by small I mean 0.001 to 0.05. Rohn
  7. I will be in too if you are buying from reeftopia. I will need a clean up crew and few others. Rohn
  8. I am in the process of designing and builting my own wavemaker / ciruclation unit to remove any dead spots in my tank. I found two unsed and powerheads rated at 200GPH. I want to use these two in design rather than buying one rated more than 400GPH. You probably know my next question. I have connected my 2 powerheads using a PVC pipe. From the blue arrow, you know the direction of the waterflow. What is the water flow coming out of the small opening at the middle (assume exact middle)? Will it increase or decrease? Or would the 2 powerheads cancel out at the middle? Or would the pressue buildup due to the 2 powerheads pushing water in the opposite directions create an increase in flow rate at the middle? Even if doesn't increase flow rate, would it increase the velocity due to pressure buildup? Rohn
  9. For assurance, you should do what I did when I first started. Set the tank Up and then shut the pump down to simulate a power failure. If you accidently pull the siphon tubes and cut the water flow, the pump in the sump will only pump the amount of water in your sump to the tank (since no water is flowing to the sump via the overflow box). Many of us make sure that the amount of water in the sump can be handled by your tank (i.e. don't fill your tank all the way up to the top ... that would be disaster). In my tank, the difference between the water level are less than a 1/4 inch and yet this is more than enough to manitain 1,000 GPH flow rate to the sump. If it is peace of mind you want, the best method is to use uninterrupted powere suply. You can easily get one of these from an old computer. It is a matter of trusting your setup and constantly doing PMs. Rohn
  10. Another point that I didn?t address in the reverse siphoning from the tank to the sump via the PVC/line that draw from the sump to the tank. To preventing this so simple. You could either make sure that the end of the pipe is always above the water level. If this is making too much noising as water splashes, simply drill a hole (I used a 1/8 drill bit) just at or bellow the water level and extend the end of the PVC/line well below the water line. This hole will suck in air and during a power failure (when the water level falls below this hole) and stop the reverse siphoning. I am sure that many knows of this but I thought I mention this just incase someone is reading that doesn?t know this little trick. Rohn
  11. A great discussion. The question of what happened in overflow box with a wet/dry trickle filter is one of the most misunderstood process in our hobby. My fiend that suggested this site to me looked at my tank and suggested that I put powerhead to suck the air out of the siphon to reduce siphon water power loss. This simply isn?t necessary if you have the setup correctly. Take a look at the diagram below. If you overflow box is anything like this (mine is). You will see that during a power failure the siphon will not break. Let me explain. As you can see the outer overflow box is in fact divided into 2 section. The outlet for water into your sump in on your left and the siphon tubes are placed on the right (section without an outlet). This important since it is that side that retain water during power failures (since it has no outlet). During normal process, the water level in the inner overflow box is slightly higher than the water level in the outer overflow box, or else the water will not flow from inner to outer overflow box. This works simply due to the pressure exerted on the bottom on the water column in your inner box is great than the pressure exerted on the outer overflow box and thus water will flow from inner to outer. During a power loss. Your pump in the sump will stop working and water will no longer flow from the sump to the tank. But the siphon between the overflow boxes will still work. Eventually the water level in your tank will drop below the small teeth (opening) or inlets, the water from the tank will no longer flow from the tank into the inner overflow box. But this still would stop the water from flowing from the overflow box to sump until the water level in the inner overflow box and outer overflow box becomes even (leveled). When this happened the pressure exerted by the 2 water columns are equal and thus water will stop flowing. If you siphon tube on either sides are bellow this so called critical level, the siphon is maintained, ready for water to flow when the power comes back up. The critical thing here is how far the ends of the siphon tubes reaches on either sides. How do you decide that. Simple. Look at the top of the divider that separate the outer overflow box. During normal operations, the water level in the inner overflow box is slightly higher than that. So the end of the siphon tube in the inner overflow box must reach below the top of this divider, which I call the critical level. If the siphon tube in the inner overflow box doesn?t reach that far below (critical level), the siphon will easily be broken when air get in the tube when the water level reaches the critical level. As you can see there is really no need to place powerhead attached to the siphon to restart the siphon after a power failure. Rohn Edited: Forgive me for any spelling error and syntax error as I am pressed for time when I wrote this.
  12. Thats too far to drive. Where is the best place to buy the cheapest LR here in Austin (within say 20 to 30 mi radius)? LR with good coralline algae on them ... without pay an arm and leg. Rohn
  13. Is this an online store (www.oceanhomesetc.com) or does it have an actually store location? If it does, can some tell me the address. Rohn
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