Arctik System
System dimensions (can vary)	2.20 m H x 1.52 m L x 0.46m W
Water temperature (Room at 20°C)	2 -30°C
Heating system	1000 W titanium
Chilling system	1 HP air or water cooled compressor with 1 titanium heat exchanger
Insulation	1" Styrofoam panels with plastic coating Front panels in clear plexiglass
Tank Options	1.4L	2.9L	9L
Tank QTY maximum par unit	100	50	25
Total Tank Volume (L)	100	150	225
Max Tank Turnover per Hour	5 to 13 (adjusted to application)
UV Irradiation Rate microw-sec/cm2	100 000 to 260 000 (adjusted to application)
Mechanical Filter-Micron size	1 to 20  (adjusted to application)
Carbon Capacity (g)	900

 

 

 

Examples of customised Multi-tank systems

 

1) For conducting toxicology studies under hypoxic conditions

In this case, the researcher needed to test the effect of low DO on the health and reproduction of breeding fathead minnows for at least 21 consecutive days. The second objective was to use the system to test the effects of low DO on the health and reproduction of breeding fathead minnows in the presence of a contaminant. 

Conceptualized plan:

Our unit for studies under hypoxic conditions:

 

 

With this units four treatment conditions can be run simultaneously with 10 replicate tanks (9 litres / tank) for each treatment.

This system was factory-tested with breeding pairs of FHM for over a week before delivery.  The precision in the maintenance of dissolved oxygen (DO), temperature and water flow through the ten 9-L tanks is showned in tables 1, 2 and 3.

Table 1

DO (mg/L) maintained over 24 h in 10-9L tanks, each containing  2 breeding FHM

	mg/L DO	Standard deviation (mg/L DO)
ROW #1 (control)	7.6	0.1
ROW #2	2.0	0.1
ROW #3	3.0	0.1
ROW #4	4.0	0.2

 

Table 2

Water temperature (°C) maintained over 24 h in 10-9L tanks, each containing 2 breeding FHM

	°C	SD (°C)
ROW #1	24.9	0.1
ROW #2	25.0	0.1
ROW #3	25.0	0.1
ROW #4	25.0	0.1

 

Table 3:

Water flow (LPM) maintained over 24 h in 10-9L tanks, each containing 2 breeding FHM

Water flow (LPM) to individual 9L tanks over 24h	LMP	SD (LPM)
ROW #1	13.8	0.2
ROW #2	13.4	0.2
ROW #3	13.5	0.1
ROW #4	13.6	0.2

 

2) For studies with marine invertebrates kept at fixed temperatures, but fed with natural plankton

The client wished to operate her Multi-tanks system under semi-open conditions as plankton carried by natural sea water is required to feed the marine invertebrates housed within the unit.  Both the level of water exchanged (up to 4 water exchanges per day) and the temperature of the seawater had to be controlled and easilty adjusted.  the simulation of seasonal photoperiod with with light ramping was also required.

Our unit:  a semi-open Multi-tank Arctic System integrated with LED fixtures and controlled by the Enviro-Monitron

This customized system consists of the fish holding portion of a multi-tanks arctic system, plus the necessary equipment required to pump, chill, and heat the water.  A peristaltic pump controls the level of make-up water, and LED fixtures located above the shelves and controlled by the Monitron, reproduce the natural photoperiod.

This unit is covered with insulation panels around three sides. Plastic flaps on the front are added to optimise chilling capacity.