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If the tank is to Be Non CO2 injected, or low tech as some call it, I would not be too wild with light intensity. Is good that lighting can be shaded as you say. With or without CO2 injection,I would start at maybe 50% light intensity for no longer than eight hours a day.

I have standing floor lamp next to an aquarium and on timer, to come on 30 minutes before light's on the tank come on .

I use same light plus triple T8 fixture over 80 US gallon low tech for eight hours a day. I dose 15 ml of Metricide each day, ten or fifteen minutes before lights come on. I also dose macro and micro nutrient's once or twice a week. Fluval 2.0 and T8's at full power. Light's rest on the edge of...

Well I think between the Lily and the floating plant's,that a stronger light might be able to be used . Otherwise, I think regular thinning out of the floating plant's and trimming on the lotus will be needed to keep from blocking too much light for carpet plant's. Lighting appear's to be bout...

Not sure the plant in left foreground is true aquatic unless it's a type of Lily.? Look's strangely like a house plant I killed this past summer on the patio.

Or small piece from mouse pad.

I can grow ludwigia Repen's in my low tech affair's and it really only look's good with good red color on tops and bottom of leaves once it as reached the surface. I then cut down to where the leaves have begun to drop, and plant the top's that look good,/red,and discard the lower scraggly...

+one on intensity over duration. Something to be said also I think for stability with regard's to lighting period. Cannot say what level of light might trigger photosynthesis, but ramping up and or down, along with siesta period's, may do little or a lot with regard's to creating or hampering...

I use the current satellite plus model along with Finnex Fugeray planted plus on 80 U.S. gal low tech. Gives me medium light and I do like the feature on the satellite plus that when selected ,slowly run's through all the color's of the spectrum which I use sometimes at night when guest's wish...

NO. 24 watts will not deliver same PAR as 54 watt bulb

My feelings/expierience's for new tanks is that it is best to start with lower/dimmer, and slowly increase the light as plant's transistion to suddenly less CO2 than when they were growing immersed and were able to gather considerably more CO2 from the atmosphere. Perhaps the plant's suddenly...

My concern for fishes,was/is light transistion from light's off to light's on not from light's on to off. With this in mind,I placed a standing floor lamp near the tanks and placed the lamp on a timer to turn the lamp on one hour before light's over the tanks come on. In this way,,the fishes...

I believe Tom has done plenty of testing ,tried differing method's at growing aquatic weed's in route to getting his degree. His post's over some decades,, seem to fairly well explain his expieriment's and his success and failures. As for peer reviewed articles,, plenty of his peer's have been...

I use four 54 watt T5 bulbs over my low tech 80 gal 300 litre but ,,I must hang the fixture above the tank nearly eight inches. Otherwise I experience problematic algae due in large part to no CO2 other than that produced naturally. Me thinks you could use four bulb fixture if...you have the...

I switched from T8 bulbs to T5 over my low tech but had to raise the fixture considerably high over my tank to avoid the algae. More light means more demand for CO2 and nutrient's. Sure you can flood the tank with uber lighting but if you cannot, or will not be adding more CO2,then you will...

Hamilton lighting Technology is where I purchased my PC bulbs. I like em.

Increasing light intensity also increases demand from plant's for CO2/nutrient's. If one cannot also increase CO2, then they better be able to raise the light.Can easily increase nutrient's. Most often there is more light than CO2 available. Most often it its not more light that plant's are seeking.

I agree with Troi that biotopes often provide fishes with environment they can feel most comfortable in not unlike people . Take for example In my neck of the woods, there are three types of folks. Ridge runner's (hill folk or mountain folk),Plow Jockey's (Farmers) and River rats (they got...

Yes,I have seen females cichlids of a few species select the best colored male and reject the poor presentation of colors by other males (often subdominant ones ). IME larger female cichlids of many species will seldom select or allow mating with smaller males or subdominant males that often try...

Well I know the author of the second article well (hope he is well also) and agree with the impact of sudden lighting over the tank as witnessed by myself with several species.(fishes are easily spooked) Is why I have light in room an hour before lights over the tank come on. Other tanks I have...

I have a keen interest in keeping fishes and have been doing so for the last forty years. Can say with fair amount of certainty that fish could care less if there is any light at all.They don't care if the tank is tea stained from tannins or cloudy as soup. Lighting is for our pleasure mostly...

I belong to a couple other forum's where they still spend a dozen or more post's and several paragraphs for each opinion as to what constitutes proper spectrum for plant growth when ever the topic arises.(much of it regurgitated heresay or opinion vigourously defended) I purchase T8 and T5 bulbs...

"Pay no attention to that man behind the curtain" for he is really a plant which speak's. (just teasing).

Darrel, Your tank's resemble my own, love em. Imagine photo of my avatar tank 300 litre, with four or five inch deep matted cover of water sprite. Some fishes I have not seen in month's . Is my understanding that in low tech,where only naturally produced CO2 is available,,that plant's use this...

I was called away from my computer before I could finfish my thought's. I think if low tech,or low energy,low maint,is ones goal then they should choose that method and someones advice and follow it. I chose Tom Barr's NON CO2 method and have no complaint's. I also enjoyed Troi's tutorial on...

I think folk's are impatient period..

Was reading discussion's on APC,and the Krib that pointed to Dutch aquarist's, and some award winning aquascapes, that indicated that they seldom use bulb's over 5000 K. Personally,,I have used 3500 K,4000K,5000K,6000K,6500K,6700K,and 10,000K bulb's and variation's/combination's thereof. All of...

8000K makes my cardinal Tetra's color's pop against the green plant's black substrate.

I too sometimes marvel at the discussion's on light's,too much,,not enough,PUR,PAR,lumen's,kelvin, LED,T5, T8,etc. My own expieriment's thus far,,seem to coincide with Clives suggestion, (can't remember thread),that plant's will grow under nearly any lighting. :lol: Perhap's a thread is in...

Pennywort works well for floating cover, or to shade the lighting a bit. I use small suction cups off cheap thermometer's for aquarium's, to secure the floating plant's where they are wanted and to keep them from drifting over area's where they aren't wanted. 8)

Thank you Clive, for detailed explanation, Makes perfect sense. It ain't about how many bulb's you can run on high energy tank's, but more about CO2 available for said lighting,dispersion of CO2. no matter the depth of tank. Was not playing I assure you, with word's. Just have seen,read,numerous...

If as Clive mention's.." Problem's in tall tank's have absolutely nothing to do with light penetration" then PAR values have little meaning?

Plant's appear small/young, could this be newly established tank or are plant's just new/young? You say you are growing tired of throwing out plant's which indicates maybe tank is not too young but plant's are? Have you tried brushing the white particulate off of plant leaves? how fast does it...

I think if T5 bulbs are placed in T8 fixture,,you will need ballast capable of powering the T5 bulb's. Were it me,,I might just spring for dual T5 fixture 48 inches long .

Re: question regarding T5 lighting over 80 gallon low tech t Began dosing NPK+ trace once every couple weeks and the plants are still doing well, More importantly,, no algae. Have not performed water change for almost two months and am topping off the tank with tapwater which is moderately hard...

Re: question regarding T5 lighting over 80 gallon low tech t Updates. Finally settled on lighting for the 80 gal and have been running 2x36 watt 6700 k compact flourescent bulbs for 10 hours a day.Plants are doing well with Eco-complete ,capped with fine gravel and addition of osmocote pellets...

Re: question regarding T5 lighting over 80 gallon low tech t Have yet to decide what fish will inhabit the tank other than my snowball pleco who was not at all amused with me moving it from the 80 gallon to 75 gallon with tankmates that are a bit too active (yoyo loaches). Am trying to source...

Re: question regarding T5 lighting over 80 gallon low tech t No the T8 bulbs wont fit the T5 fixture. I went and bought a plain overhead light fixture from Lowe's that holds the two T8 bulbs. The bulbs were also purchased at Lowe's. For now ,the fixture is just setting on the glass tops over...

Re: question regarding T5 lighting over 80 gallon low tech t After speaking with a friend with similarly set up low tech tank, I decided to go with two T8 6500 k full spectrum bulbs which totals 64 watts. Plants have only been in the tank for five days so I feel only time will tell. Also...

Re: question regarding T5 lighting over 80 gallon low tech t Thanks Dan, I am hopeful that many of the plants selected will draw from the base layer of Eco complete intially and I believe I will increase the fish load planned ,as well as dose water with supplements when and if the plants...

Re: question regarding T5 lighting over 80 gallon low tech t Thank You for response Perhaps I should clarify,, Tank is 80 U.S. gallons. I tried to select plants that according to research ,would appreciate moderate lighting to low lighting and am fearful that present lighting might be actually...

Re: question regarding T5 lighting over 80 gallon low tech t My apologies, I should have stated that my goal is to have sustainable growth with minimal maint.

Would like opinions as to whether 108 watts of T5 lighting would possibly be too much lighting for low tech tank with the following substrate and plants. Substrate 80 lbs of eco-complete capped with fine gravel .Depth approx 6 inches at back of tank ,to 4 inches at front. Plants are/will be...

Have read the other guys post and it would seem ,that others here agree that blue and red spectrum is needed in some degree?