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richms

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Posts posted by richms

  1. No, because the tanks will still convect heat to the air in the room. The room is a sealed box, electricity goes in, and heat leaks out of it. The total electricity in will equal the heat coming out once its all at the same temperature inside. The heaters in the tank will just let that happen faster at a greater use of electricity for that time period. All resistive heaters are 100% efficiant so it doesnt matter if you have a fan heater, oil column heater, a ceramic heater or heaters in the tanks, the total heat added to the room is equal to the joules or kilowatt hours taken from the power

    A heatpump is nothing like a fan heater because they are 4 times more efficiant (give or take) so if you heated the room with that, then it would be stupid to have heaters in the tanks as well with their 100% efficiancy, but it still may help to get the tanks to temperature quicker then just relying on heat from the air in the room.

  2. Just chuck a heater into the tank to get it up to the room temperature.

    If the heating is just resistive electric (which is is) then the room will follow the tank temperature anyway, so the cost will be the same overall.

    If you had a heatpump it would of course work out more expensive to use resistive heaters in a tank

  3. Air holds stuff all heat, thats why fan heaters are so bad at heating a room, they make hot air that rapidly becomes cold air because there is so little heat in it.

    If you put a heater in the tanks to get them to temperature there should be no loss of heat because of the air being warm too, but to try to heat water that way will take days and days.

  4. 2 long ones , 2 that are about 90mm long, a starfish shaped one, 2 small ones in the lift tubes on under-gravels, 2 crummy sponge filters and a small one on its own in another tank with nothing in it yet.

    I have had to turn the undergravels down since most of what was coming out was just air.

    If it lasts a year then its more then paid for itself IMO.

  5. I dont know if they had to get it from their spam folder or not, I just assume things are going to go to crap when emailing there since telecom have zero interest in sorting it out and just fob you off to yahoo when you complain about things going into peoples spam folders. yahoo want forms filled out detailing what my bulk mailing policies are and how I handle complaints and crap like that. The server has reverse dns, has the mx records pointing to it and has no history of spam complaints against its address, so there is no reason it should go to the spam folder but it still does.

    edit: And its a bit noisier then the other pumps were when new, but quieter then they were in their worn out state, still a little too loud for the loungeroom but man does it pump air out the airstones, and the uplift tubes on the undergravel in my goldfish tank now seems to have more water moving out it then the fluval canister on the tank does, plus I got 8m of airline from hollywood today to run over to the other tank and some bigger airstones so it should help there too.

  6. Went to the courier depot today to get it since I dont have an arrangment to leave parcels with fast way so they just left the card.

    Anyway, its loud when blowing air out, if I block it, it is quiet enough, will have to see how it goes driving some airstones vs in free air since that makes a big difference on the other pumps. It might end up in the basement hanging on a rope if its too noisy in the house

    Certainly blows air tho. and there is pressure to spare. Could probably use it to inflate my exercise ball that I keep procrastinating over putting air into ;)

  7. some people seem to believe that you should pay for the materials yourself. I disagree because that disadvantages pickup customers who will be paying thru the higher auction/buy now prices.

    I think if you were to have 2 listings for everything, one pickup only at a cheaper price to the other with no pickups you would anger the same people. There are a lot of messed up people with no grasp on reality if you venture into the trademe messageboards.

  8. but should i have to pay more just because the person i buy it from's time is worth $100 a hour rather than the one who doesnt have a job?

    Packing is a no skill job so should be charged out at about $12 an hour. If you can only get 10 things packed in an hour (6 mins each) then its $1.20 worth of time for the packing ontop of materials and the cost from the contracted post/courier service.

  9. lol, yup :lol: trouble is if you flip someone on the road or push them into another car, chances are someone will get your plate number and you'll be famous. ppl wanting your signature, fingerprints, money etc. :-?

    The worst one is when you get the commemorative photograph in the mail...

  10. the marley spouting with some metallized mylar in the back of it is the best bang for the buck. You can use foil but it will go dull and need replacing more often then mylar in my experiences.

    You can put the whole T8 fitting in if its a single, or if a twin then cut notches so that just the tube holers are inside and the batten is along the top (flat part) of the spouting.

    I gave the ones I made away so cant get pics easily but its pretty straight forward if you have the batten fixture and the spouting infront of you to see how they can go together.

    As usual if you dont know what your doing with the wiring then ask a mate who does or a sparky

  11. I dont see how this will be any cheaper being made of ply then glass when you factor in the time to build, the costs to waterproof it that are not present on glass, the lack of resale value and the need to make it pretty thats not needed on glass.

    IMO, make it glass, and if you like wood then glue some veneer onto it. At least that way you can pull it off when you sell the tank to upgrade to a bigger one.

  12. Am emailing them now to ask about other things that are not listed at the moment to add to the order, since I will be needing some airline and a couple more gang fittings to go between the tanks, will let you know when it arrives. Shame they dont do pickups, since I wont get it by the weekend.

    My sound level meter is a piece of crap and only goes down to 50 so is useless for things like this unfortunatly, because if its 50dB then its far too loud already..

  13. $40 including the courier etc, which is about what it would cost to replace 2 of my other pumps since I cannot be stuffed opening them up etc etc right now.

    I think I will take a punt on it, its only $40, noone said "HELL NO STAY AWAY" so its worth it just to not have to do the 6 monthly re-bellowing of the others.

  14. I would go concrete before I would consider wood for a tank, and even then it would be something built in-situ so becoming a permanant part of the house rather then a portable tank like you are describing.

    Glass is a cheap, reliable proven method of making tanks, why do you want to stray from it?

  15. http://www.trademe.co.nz/Home-living/Pets-animals/Fish/Pumps-filters/auction-182132292.htm

    Before I hit buy now, is there any compelling reason that this air pump should be avoided? 3 of my smaller ones are needing bellows replaced (AGAIN) and with the time saved this looks to be a good idea, but if they are really noisy, really unreliable or theres some other reason not to get it I would like to know before hitting the buy now.

    I am genuinly interested in buying this so it fits into the exception for the anti trademe posts as outlined in the guidelines.

    If someone wants to suggest an alternate souce for this type of pump or other recommendations that would be great too.

  16. Ok well it wont be till next week I get enough time to have a try but from the video it looks no problems. From the pixelated mess that is youtube it looks like the same holesaw I got (I wish more people would use vimeo of any of the other sites that dont recompress to virtually nothing)

    I never thought of ebay as a source damnit.. ah well for the bigger ones I will ;)

  17. After seeing what seti does for power consumption, no, wont be running it again.

    Perhaps if one was to have a watercooled PC with the heat going to an aquarium but thats effort and still not worth it just to be in a list of people with more scores, its like car envy for computer geeks

  18. from what i remember the 25mm refers to the inside diameter of the hansen fitting and you need to use a 32mm drill bit to drill the correct hole

    Thanks for that, I had a feeling that it would be 32 but all I have here to measure at the moment is a shoddy dressmakers tape in cm.

    Do you know what size the 20 and 32's take? I may as well get those bits at the same time?

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