The Rebuild Begins!!!

[ILLBKING]

Geoff, I would be interested in know what you do for the nitrate problem as well. My tank drains 27' to the sump as well and after about 4 weeks, I noted the same thing, mind you I had know idea why! LOL but never the less. My thoughts now lead me to think that piggen the line may be a soulution. If done often enough, 1 time a week it may help?

[tashier]

Whew, not going to try to go back and read all of this thread...

[three90s&125sump]

I never even thought of the drain like that. I don't have nearly the distance to go maybe 17 feet.


Oh well nothing I am going to do about it now. Just keep doing water changes.

[afbengochea]

hey G, what type of epoxy were u using to stick the rocks together? The clay type or a 2 part solution like u used for the sandbed?

[Geoff]

i used the same stuff for the BR as i used for the bottom. i had a couple of small batches made up. one with like 3 parts sand to 1 part epoxy, and another that was like 4 parts sand and 1 part epoxy. the thicker 4:1 mixture was for making a lump and placing a piece of BR on it. the thinner 3:1 mixture was used to pour between BR pieces to lock them together. dump a fair amount on the joint, pull apart to let it run in a bit than stick them back together. then pour a bit more on the joint for good measure. the mixture matches the BR colour very well so you do not need to worry about it looking funky.

the only thing that turned out funky were the FSB plates on the bottom. for some reason the silly cone that i used to seal the plates together has turned a funky neon yellow colour. unsure on why. the only thing i can think of is that the epoxy has something in it that has mildly reacted with the epoxy. just kinda funky. the sillycone used elsewhere in the tank looks normal. clear like it is suppose to.

Brad-what is piggen the line?

tashier- WIMP!!

Jason- i can not remember what you said when you were here that made think of testing the nitrates, but i did. i knew what the results were going to be even before i finished the test. for some reason it just hit me that i had a 45' wet/dry.

G~

[ILLBKING]

The silicone in my Refuge is neon yellow to. I don't think its the epoxy.

In the oil feild we use pigs to clear out H2O in the winter time. For temperary work, tubing, 2"steel, is screwed together in order to transfer fluids, they will freaze and split of H2o is left in them so we use a Rubber ball or often a shaped spunge and put it in one end and blow it out the other, it pushed the water out and it wipes the walls completely dry.
A houslhold cleaning spunge works good to.
It could be caught with a strainer at the sump end.

[Geoff]

Tom made me put cleanouts on all of the ends of the 45' runs, so i could run a cleaner through them. not exactly sure how much fun that is going to be though.

G~

[tdwyatt]

Originally Posted by three90s&125sump

Right on.

If I didn't have to pay for my addiction I would like to go to school for it myself.


I am still waiting for Mr. Wyatt to chime in here with his rebuttal.

I have a small tidbit to throw out here that should start some discussioin on the subject. We all recognize the existance of binary stars, some of which are actually dual black holes rotating around a common center of gravity. If such a common center of gravity exists, and both stars have event horizions behind which nothing below the speed of light can escape, then how do the two stars remain in gravitaitonal capture of each other???

[tdwyatt]

Geoff, you should have no problem pushing/pulling the sponge through if it is not too tight, you could run a sponge in front of a plumbing snake to do the trick using the cleanouts.


This might be easier if you have two people doing it, with the pipe just damp and the sponge fitted as several disks tied together, running line to both ends just in case the sponges become lodged at some distance from the end. It would be better to have them tied to a line and use the line to pull them through to each end, rinse the sponge out between pulls, then pull it back to the other end. With the line running to both ends, the only real task would be getting one end of the line to the other end of the pipe with the snake.

[three90s&125sump]

Originally Posted by tdwyatt

If such a common center of gravity exists, and both stars have event horizions behind which nothing below the speed of light can escape, then how do the two stars remain in gravitaitonal capture of each other???

The wonders of chaos.

Everything in the universe is influenced by the gravity of everything else in the universe. A binary black hole would just be pushing the envelope on their closeness. They may be rotating around a common center of gravity but they still have not broken past their respective event horisons.

[tdwyatt]

Originally Posted by three90s&125sump

The wonders of chaos.

Everything in the universe is influenced by the gravity of everything else in the universe. A binary black hole would just be pushing the envelope on their closeness. They may be rotating around a common center of gravity but they still have not broken past their respective event horisons.

Devili's advocate: If the speed of gravity were limited to the speed of light, then how can the "reach" of gravity extend beyond the event horizon to exert its effect on the other binary star, or for that matter, how can the event horizon NOT be the limit of the huge gravitational effect exerted by the amount of mass inside the black hole's realm? Newtonian physics of gravitation says that the effect of gravitation in instantaneous throughout the universe (not sure what Einstein or Neils Bohr's POV* is on this), with that in mind, how can we not predict an ultimate collapse of the universe back to a singularity, a sort of cosmic gravitatioinal universe of Big Bang after Big Bang on a cosmic and epochial scale???

(DISCLAIMER: attention readers that are not going to delve into this WITH SOME EXTRA READING, the comments here are me prodding discussion, not necessarily the accepted POV of physicists at this time, read some of the links below for a better understanding of the current state of physics on the topic)



OK, rather than push the old school dogma, a respite into some of the more recent UGT stuff with a few links:

http://www.allanstime.com/UnifiedFie...ry/gravity.htm
http://www.math.niu.edu/~rusin/known...dex/83-XX.html
http://arxiv.org/pdf/gr-qc/9411006
http://en.wikipedia.org/wiki/Twistor_theory
http://en.wikipedia.org/wiki/Nordstr...of_gravitation
http://www.arxiv.org/abs/gr-qc/9504050

these should give you some threads to start discussion, dig through the stuff at the arxiv site link...




*
Semiclassical gravity is the approximation to the theory of quantum gravity in which one treats matter fields as being quantum and the gravitational field as being classical.
In semiclassical gravity, matter is represented by quantum matter fields that propagate according to the theory of quantum fields in curved spacetime. The spacetime in which the fields propagate is classical but dynamical. The curvature of the spacetime is given by the semiclassical Einstein equations, which relate the curvature of the spacetime, given by the Einstein tensor G_μν, to the expectation value of the energy-momentum tensor operator, T_μν, of the matter fields:

where G is Newton's constant and ψ indicates the quantum state of the matter fields.
Since the theory of quantum gravity is not yet known, it is difficult to say what is the regime of validity of semiclassical gravity. However, one can formally show that semiclassical gravity could be deduced from quantum gravity by considering N copies of the quantum matter fields, and taking the limit of N going to infinity while keeping the product GN constant. At diagrammatic level, semiclassical gravity corresponds to summing all Feynman diagrams which do not have loops of gravitons (but have an arbitrary number of matter loops). Semiclassical gravity can also be deduced from an axiomatic approach.
The most important applications of semiclassical gravity are to understand the Hawking radiation of black holes and the generation of random gaussian-distributed perturbations in the theory of cosmic inflation, which is thought to occur at the very beginnings of the big bang.

[tdwyatt]

http://einstein-annalen.mpiwg-berlin.mpg.de/home

[Geoff]

i tried a little experiment today to see how close i am to matching my return to my skimmer processing. the result is, not even close. my skimmer is a Mag 12 powering an eductor. my return is a T3 pushing about 12' of head. not even close. the T3 is way over powering the Mag12.

FYI- a Mag 12 pushes 1200gph. the T3 pushes 800gph. this just goes to show how difficult it is to match flows even when on paper it should not even be close.

i guess it is time to make the skimmer bigger.

G~

[Geoff]

very minor update. i ordered my 30g conical settling tank last night with stand. i will need to cut the stand down and reweld it in order to fit it where it needs to go though. i will order some 2" uniseals for the connections in and out of the settling tank either today or tomorrow.

things are starting to colour back up after their Fe poisoning from my RO going bad. the Typhoon RO/DI is doing a great job of supplying clean water.

i am also planning on making my skimmer taller so that i can slap my 1/2" eductor on it instead of the 3/8" that is already on it. i want to push some more water into the skimmer. its flow is not up to the returns. which is sad since the the return is Velocity T3 with nearly 15' of head pressure and the skimmer is powered by a Mag 12.

G~

[gitsumpottery]

hey geoff,
how did all the fish and corals fare through the poisoning?

Zac