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If it is blue-green than erythromycin will fix it. http://faq.thekrib.com/algae.html#cyano blue-green algae is actually cyanobacteria and indicates poor water quality

What's the latest Aquarium World issue? The last one I received was May http://www.fnzas.org.nz/aquarium-world.0.html. Shouldn't there be an August issue ??

Hi Kellz, Welcome to the fishroom. Green water. When you need it for feeding fry you can't get it and when you don't want it it's there. Typical. Just have patience, just as Andrew says it doesn't hurt the fish, only looks bad. It will eventually disappear. Perhaps don't feed fish for a while. Are you sure the tank doesn't get direct sunlight? From you post it sounds like the tank is in your living room. Perhaps some late afternoon sunshine coming in through a window now that the sun is still low? The Upper Hutt Aquarium club has a diatom filter available. That will remove the green algae if you can't get rid of it any other way. Of course you'd need to join as a member first.

Warren, what do you use to scan for spam?

Same here, I look out of my window and accross the street I see the Saturn cable just sitting there. When I follow the cable to the start of Akatarawa road I see some bare wires dangling there. Turns out it's not connected, abandoned by the company.... aaargghh If you have an old 486 then a firewall is easy-peasy, and they don't cost $. Some of them don't even need a harddrive but fit on a single floppy. http://www.ipcop.org/ http://lrp.steinkuehler.net/ http://www.zelow.no/floppyfw/ to quote " ..one of these floppies booting on an old 'doorstop' 486 machine will be faster and more reliable than a windows based software firewall running on your desktop Pentium 2 (try running windows off a floppy disk with 12 Megs of RAM :-)....." Anyway, where's the tropical fish in this again ;-)

Thanks Goldie An email virus (or any other computer virus) as such can not be spread using the forum. What I do find lately is an aweful lot of 'spam' ie junk email in my email inbox everyday. I guess that's the penalty for posting my email address on the internet. ([email protected] is of course a real giveaway). Luckily I'm in the position to filter out a lot of these junk mails at the mailserver but I will have to become more rigorous doing that. I'm contemplating simply denying all emails except send to me by people who are on my 'allowed list' . Anyone else noticed an increase in Junk email lately. Cees

No

those long url's really src*w up the display of a page. Could you guys put links it the way bbcode allows you see e.g. proper bbcode for linking the above link to yahoo would then be nice site or whatever (quote this message and look at the source if you want) Thanks

Hi Ira, powder is to reactive for my purpose. I need a few rocks :-) Marble would probably do the same thing.

Welcome to the forums AQUAMANX. Hope to see you here often. Could you please turn the caps-lock off , it looks as if you are shouting. thanks Cees

Ira : no I haven't found any yet apparently it's 'mined' in the nelson area somewhere.

Received this info today, (Also realized we don't have a 'genereal interest' forum) Distinguished scientist Dr Robert McDowall will speak on "Hidden Treasures Exposed: Discovering our Freshwater Fish Fauna". Dr McDowall is an internationally respected fisheries scientist with NIWA in Christchurch. He is New Zealand's foremost biologist specialising in the ecology, natural history, and taxonomy of New Zealand freshwater fishes, in particular native species. Dr McDowall is known for his ability to enthuse and inspire researchers and the public alike. He has spent 38 years in fisheries research, and has published many books and papers. The lecture is organised by the Wellington Regional Council and the National Institute of Water and Atmospheric Research (NIWA). For further information, please contact: Murray McLea, tel. (04) 384-5708, email: [email protected]. When: 6:00 p.m. Wednesday 4 September Where: Urban Function Centre Theatrette, BP House, corner of Customhouse Quay and Johnston Street, Wellington

I use (or did use when I still had my planted tank, where did that one go? ) my hydroponics mix. A few hunderd gram cost me less then $10 at, you guessed it Otaki. Will last me a lifetime .

There are a few more in the Wellington area, one in Upper Hutt not far from where I live. However, Otaki is the only one I've seen that supplies 'raw chemicals' as well as standard nutrient mixes.

Otaki hydroponics will courier to your home address. http://www.otakihydroponics.co.nz/ I'm not sure where you are Len. It's a nice shop to visit 40 minutes north of Wellington. But I'm sure if you give them a call and tell them what you need they'll weigh it out for you and send it by courier. They sell hydroponics mixtures as well as the individual chemicals. Just tell them you need a kilo each of potassium sulphate, potassium nitrate and magnesium sulphate you'll be right. potassium sulphate is available at garden centers and so is magnesium sulphate (epsom salt) don't know about potassium nitrate. I'd go to otaki hydroponics anyway, better deal for sure. Cees

Do you have a photo for us to look at? If you can email me one I'd be glad to put it on the website.

tell me more

The pdf document mentioned above has some more interesting paragraphs in it about laterite here is a summary Residual iron laterite deposits Iron may be selectively concentrated in residual deposits as weathering removes the more soluble silica and other materials. Weathering of ultramafic rocks such as serpentinised peridotites, pyroxenite and dunites under tropical conditions, may form laterite iron deposits with 40-55% Fe. Iron laterites form extensive mantles and plateaux, up to 20 m thick, but more typically less than 6 m thick, and consist of nodular red, yellow or brown hematite and goethite. Bog iron limonite deposits of Northland Small limonitic bog iron deposits occur near Kaeo, Okaihau, Kerikeri and Kamo. They have been formed from leaching of ferrous iron from Kerikeri Basalt by carbonated surface and ground waters with subsequent deposition at the surface of ferric hydroxides. The Potaetupuhi Bush deposit on the Okaihau-Kerikeri Road consists of small patches of high grade limonite (average analysis of 43.1% Fe) that extend over a total area of 4 ha (Bell and Clarke, 1909). Another deposit near Okaihau, has been intermittently worked, producing a combined total of 39,111 t up until 1961. The material was used as an agricultural stock lick to relieve 'bush-sickness', as an absorbent in the purification of coal gas, as a colouring agent in bricks, and as road metal. The deposit is less than 1 m thick and some 60,000 t containing 60% Fe 2 O 3 remain. The deposit near Kamo has been intermittently worked, producing 26,165 t of ore up until 1961. The deposit near Kaeo contains between 10 and 36% Fe 2 O 3 and may be an exhumed fossil laterite. Similar buried deposits could be discovered elsewhere in the region.

Found the location of laterite I mentioned, it's not the takaka hill but in onekaka. The information is in a pdf document downloadable from here http://www.med.govt.nz/crown_minerals/m ... 5_iron.pdf This is the paragrah describing the lateritic deposite. I guess one of the keywords is 'surficial'. Redeposited lateritic limonite, Onekaka Bodies of surficial limonitic iron ore occur in a belt from Ironstone Creek, Onekaka, north to the Parapara Inlet. They lie mainly on Arthur Marble and are preserved in a fault-angle depression (Bishop, 1971). The material is thought to be laterite, transported from the Tertiary peneplain and deposited in caves within the marble (Grindley and Watters, 1965). The material consists of hydrous iron oxides, and is compact, spongy, botryoidal, or earthy, with a mineralogy of limonite, goethite, turgite (hydrohematite), quartz and mica, and less commonly, pyrite and selenite (Williams, 1974). Onekaka ore was first mined by Maori for use as a colouring medium (Williams, 1974). Small quantities were quarried in the 1880s and 1890s for use in paint manufacture. About 813,000 t were mined between 1922 and 1935 to produce 40,640 t of pig iron (Grindley and Watters, 1965). A small amount was also mined for use in gas purification. Landreth (1946) estimated total indicated and inferred resources of 9.65 Mt of ore at an average grade of 40% Fe, and gave individual average grade figures of 51.79% Fe (Washbourne), 45.17% Fe (Onekaka), and 50.48% Fe (Tukurua).

Not sure what system you are talking about. Any website links?