teebs

Standard price for their house brands.

Tangs take live pods, live brine shrimps etc.

Data is always necessary...At the very least it will show proof of what you are talking about. Anyway, to add on, a couple of months back I had a discussion with a supplier of DI resins in USA. And what he told me was that for a catridge of DI resins like the Crystal Pro unit, the amount of resin in it is approx 1.5lb and this amount of MB400 resin is able to absorb 5,100ppm gallons of ions before it is exhausted. So to calculate how long your Crystal Pro DI catriges can last (Assuming they are using 1.5Lb MB400 resins in each catridge), the formula is: 5,100ppm x 2 catridges/ TDS reading of your tap water = how many gallons of DI water that can be produced. To convert gallons to Litres, multiply by 3.8. In my case, it will be: 5,100 x 2/ 165 (TDS of my tap water) x 3.8 = 235L of DI water.

The best DI system I have seen is from Aqua Technic. They use two seperate Kati and Ani De-ionizers in this system. According to them, 1L of Kati/Ani De-ionizer is able to produce 100G of DI water.

The cost difference between using a pure DI unit and a RO/DI unit can be quite substantial even in the short to medium term. A lot depends on the amount of pure water you require and also the initial and replacement costs of the catridges. Using the RO/DI unit that I'm getting as a guide to compare to the current Crystal Pro DI unit that I'm using, the cost difference is still pretty substantial. 5 stage 100GPD Portable RO/DI unit with replacement catridges (1 sediment, 2 carbon, 1 MB400 DI catridge) and 1.5 Lb of replacement MB400 DI resin. 1.5Lb of DI resin is sufficient for 4 refills. 1 DI catridge is rated for minimum 500G of pure water, sediment and carbon catridges are rated for between 1,500 to 2,500 gallons. In my case, my set is rated to produce at least 3,000 gallons (~12,000L) of pure water. Cost is SGD 400 for this set. Current Crystal Pro unit Cost SGD 198 (AM website) Replacement Hi Cap DI Catridge - $30 each Replacement Carbon Catridge - $24 each Water used for top up of evaporated water is approx 20-30L per week. Using NSW from Iwarna for water changes. Currently, Crystal Pro unit lasts about 2 months before I need to change the DI catridges. Last replacement was before CNY during the AM CNY promotion. Current TDS reading of the water generated by the Crystal pro unit is 95ppm. Assuming: 1) Change both DI catridges every 2 months, 1 year spending on DI catridges: $360 2) Change Carbon filter every 6 months, 1 year spending on Carbon filter: $48 3) Total cost for 1 year: $198 + $360 + $48 = $606 4) Total DI water produced: 240L based on 30L weekly over 8 weeks 5) Annual DI water usage: 30L/week x 52 weeks = 1,560L Assuming waste water from Ro/DI unit is drained away: 1) Assuming 120L of pure water produced per month, waste water production at 2.5x of pure water production: 300L/month or 75L/week 2) SP Services Water Rate: $1.17/cu m + $0.28/ cu m = $1.45/cu m 3) 1 cu m of water = 1,000L of water 4) Annual waste water cost = 75L/week x 52 weeks /1000 x $1.45 = $5.66

Take note that your UV wattage must be suitable for your tank size. Also to be effective, you need a lower flow rate through your UV unit especially if you want to kill bacteria in the water column.

U sure it is 16 red notes per kg???

All rocks from coral farm is $16/kg if I am not wrong. Indian chief will be able to tell u whether there are any rocks with corraline algae since he bought them recently.

Yup, for the RO membrane to start producing pure water, water pressure needs to be between 45 - 65 psi. I'm not sure whether this is still the case for all HDB flats though. I know for old flats, the upper levels have lower pressure than th elower levels but the water pressure in my flat seems to be ok.

Wow...you are using high end stuff... One easier way of producing less waste water is to use the 150GPD RO membranes. The waste water production is about 1.1 - 1.5L for every 1L of pure water produced. The 100GPD RO membrane that my unit comes with will produce ard 2L of waste water for every 1L of pure water. BRS has many different RO/DI units at pretty reasonable prices but my price is cheaper than what BRS is selling at. Just curious...why are you using a booster pump with your RO unit? I believe our house water pressure should be more than 45psi.

Incredible...nobody interested at $400...

RB is only busy and teeming with people on shipment day. Other days it is usually very quiet. For RB most of their fishes are snapped up on shipment day.

Eeeerrrr....your tank very big meh??? Why kenna bomb right, left, up, down and centre...

Actually most LFSes are pretty quiet except on shipment days when it is worse than a wet market.

Reading may not be accurate, that's all.

I think if just list down nationalities still ok lah... But if Ah Siang goes into uncharted territory up north or down south...I got nothing to say...

Dun mind russian but dun like afro-americans... But russian exotic meh? Think quite common leh... List the even more exotic ones lah...

Ah Siang...I expected much better from you... U should have listed down the more exotic ones mah...

I think Indian Chief is the one shopping FOR wives...

I'll confirm again on Wed.

Your post count increases by 100 per day... By end of this year you will be no. 1...

Hi Desi, I believe the ones you saw at Marine Depot are the full size under sink RO/DI units. The one I'm getting is a portable RO/DI unit that has two outlets for drinking water and aquarium. The portable one I'm getting is rated for a minimum of 1,500 gallons of water and the full size ones are rated for 2,500 ~ 3,000 gallons of water. The DI unit is rated to produce 500 to 1,000 gallons of 0ppm water. This assumes that the water from the RO membrane is less than 20ppm.

Locally it's probably around 400 and above depending on the type (3,4,5,6 stage, full size (under sink) or portable (table top)), RO membrane used (50G, 75G, 100G, 150G) and of course brand. Just take note though that RO/DI filters generate quite a bit of waste water which you will either have to drain away or keep in a bucket for flushing the toilet, mopping the floor, washing clothes, watering your plants etc.

Store room is pretty much standard size for HDB flats. But the DI resin and refill catridges dun take up much space anyway so I will still be able to find somewhere to chuck them in.

I'm still waiting for some replies from my supplier before I confirm my order and get the unit in. As for bulk orders, I would prefer to use it first and see the performance before I proceed with a bulk order. Anyway, my unit will be shipped with a set of replacement filters and also a 1.5 LB nuclear DI resin which is certified to certified to NSF/ANSI-61 Standards. The 1.5LB DI resin is sufficient for 4 refills.