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Reckon this will work really well for you. Here's a link to my little journal on retrofitting cree leds into hood: http://www.ukaps.org/forum/threads/diy-move-from-t5-to-led.33917/#post-389229 would be confident to do it again but reckon those cree xbd floodlights linked above would be just as...

doh, linked to wrong ones... check these instead: http://www.ebay.co.uk/itm/High-Quality-18W-6-CREE-LED-Work-Lamp-Flood-Light-DC-9-30V-Pure-White-Square-New-/181273768982?pt=LH_DefaultDomain_3&hash=item2a34c23416

these will be excellent: http://www.ebay.co.uk/itm/1550LM-Mini-6-Inch-18W-6-x-3W-CREE-LED-Light-Bar-as-Worklight-Spot-Flood-Light-/271609462930

I did a cree xbd led fixture this summer: http://www.ukaps.org/forum/threads/diy-move-from-t5-to-led.33917/#post-363110 star board mounted cree leds / driver etc are pretty cheap to be honest, and that's even for a consumer buying not in quantity. All said the mini floodlights above would do a...

http://www.ebay.co.uk/itm/High-Quality-18W-6-CREE-LED-Work-Lamp-Flood-Light-DC-9-30V-Pure-White-Square-New-/181273768982 these are equivalent to tmc 600 (6 cree xbd 6500k) amazing value, power and "natural day" light.

have a look at this cree option: http://www.ebay.co.uk/itm/High-Quality-18W-6-CREE-LED-Work-Lamp-Flood-Light-DC-9-30V-Pure-White-Square-New-/181273768982 (tmc grobeams have 5 or 6 of these very same emitters) so this will be very similar in performance. I have a diy cree LED fitting using these...

...looks cool and will save a few quid! did you get special water proof GU10 units, etc? Can you point me in the direction of the kit you used? cheers!

...yes will look into this, nice one!

that figures, shame as LED etc is a massive leap in price....

Hi Was wondering if you could replicate the halide / led shimmer but with t5 tubes by dividing up and spotlighting the light from the tubes in someway...anyone tried this? I've thought about fixing a row of lenses to the reflector or something? cheers

I'm going to give my fish an Olympic opening ceremony effect!

arduino...I'd never heard of that - cheers, sounds like a learning curve coming on! I'm gonna build a Wallis n Grommet style Aquarium!

I've seen lampspecs do the dimmable T5 ballasts for about £25. Could retrofit my d-d I bar, and use a controller I guess. All stuff for the future! cheers Gary

Fair enough, just figured that there would be a well known method not involving big expense... cheers Gary

This is the kind of thing I have in mind - a graduated sunset effect, but as the sole purpose would be to graduate the on / off period, the grobeams + controller is a major expense. Thinking more along the lines of some simple LED downlights, as mentioned, but plugged into something that would...

yeah starting to realise that a second set of LED lights could be easier to work with. I find fish go ballistic when plunged in to sudden darkness...a bit like me :jawdrop

To avoid the drastic on / off of my t5 lights, is there a dimmer type gismo that can be attached to the timer switch? I'm guessing I'd need to switch/check my ballast / tubes are the dimmerable type? :?:

sorry I meant biogenic decalcification. You increased the light intensity by removing the floating plants. Do you monitor the pH during the photoperiod rather than the start? You may add sufficient CO2 to lower the pH, but as soon as the plants hit their peak of activity how can you then have...

I really like comparing to the water report, it made me stop using the toy test kits I had...measured no nitrates when mine were in fact 20! What is of interest though are these figures relating to alkalinity / carbonate levels (from the main page rather than the pdf): Hardness Level Slightly...

Hi Mark To back up your water testing you can also enter your post code here http://www.stwater.co.uk/category/536?p ... itySubmit= I wonder if the water company has been making any changes recently that affects your supply? This could explain why all of a sudden the water conditions have...

Hi Mark- what do you mean by "liquid CO2 injection"? is that pressurised CO2 or an off the shelf liquid supplement? If so, what's the make? Where in derbyshire are you based?

Just wondering are you still adding the bicarbonate of soda?

In the end Garuf, have you come to the conclusion to add RO to your tapwater, or do you persevere, increase the CO2 rate, etc? On the new tank I'm putting in place I hope to be able to get good results using tapwater, we'll see... cheers Gary

Hi Mark, do you know what the total alkalinity / carbonates are of the tap water you are using to do the water changes? I read you said a hardness of 6dH, but do you know the kH / ppm CaCO3 from the water provider? (can get a water report from their website and is really revealing regarding...

Hi there, I'm looking to get a slight shimmer accent to my lighting setup. I have a tank hood with 2 39w T5 Osram 965 HO cool daylights for growth, but wonder if I can compliment this with a touch of shimmer from a point light source. (still at the hardscape stage...) Again this is not for...